1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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5 | %general-entities;
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6 | ]>
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7 |
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8 | <sect1 id="ch-system-systemd" role="wrap" revision="systemd">
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9 | <?dbhtml filename="systemd.html"?>
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10 |
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11 | <sect1info condition="script">
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12 | <productname>systemd</productname>
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13 | <productnumber>&systemd-version;</productnumber>
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14 | <address>&systemd-url;</address>
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15 | </sect1info>
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16 |
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17 | <title>Systemd-&systemd-version;</title>
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18 |
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19 | <indexterm zone="ch-system-systemd">
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20 | <primary sortas="a-systemd">systemd</primary>
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21 | </indexterm>
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22 |
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23 | <sect2 role="package">
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24 | <title/>
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25 |
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26 | <para>The systemd package contains programs for controlling the startup,
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27 | running, and shutdown of the system.</para>
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28 |
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29 | <segmentedlist>
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30 | <segtitle>&buildtime;</segtitle>
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31 | <segtitle>&diskspace;</segtitle>
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32 |
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33 | <seglistitem>
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34 | <seg>&systemd-ch6-sbu;</seg>
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35 | <seg>&systemd-ch6-du;</seg>
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36 | </seglistitem>
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37 | </segmentedlist>
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38 | </sect2>
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39 |
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40 | <sect2 role="installation">
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41 | <title>Installation of systemd</title>
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42 |
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43 | <para>First, fix a build error when using Util-Linux built in
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44 | Chapter 5:</para>
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45 |
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46 | <screen><userinput remap="pre">sed -i "s:blkid/::" $(grep -rl "blkid/blkid.h")</userinput></screen>
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47 |
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48 | <para>Fix a potential security issue with framebuffer devices:</para>
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49 |
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50 | <screen><userinput remap="pre">sed -e 's@DRI and frame buffer@DRI@' \
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51 | -e '/SUBSYSTEM==\"graphics\", KERNEL==\"fb\*\"/d' \
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52 | -i src/login/70-uaccess.rules</userinput></screen>
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53 |
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54 | <para>Disable two tests that always fail:</para>
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55 |
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56 | <screen><userinput remap="pre">sed -e 's@test/udev-test.pl @@' \
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57 | -e 's@test-copy$(EXEEXT) @@' \
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58 | -i Makefile.in</userinput></screen>
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59 |
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60 | <para>Rebuild generated files after modifying Makefile.am and
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61 | Makefile.in:</para>
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62 |
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63 | <screen><userinput remap="pre">autoreconf -fi</userinput></screen>
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64 |
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65 | <para>Create a file to allow systemd to build when using Util-Linux
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66 | built in Chapter 5, to disable LTO by default, and to build without
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67 | xlstproc:</para>
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68 |
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69 | <screen><userinput remap="pre">cat > config.cache << "EOF"
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70 | <literal>KILL=/bin/kill
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71 | MOUNT_PATH=/bin/mount
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72 | UMOUNT_PATH=/bin/umount
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73 | HAVE_BLKID=1
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74 | BLKID_LIBS="-lblkid"
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75 | BLKID_CFLAGS="-I/tools/include/blkid"
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76 | HAVE_LIBMOUNT=1
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77 | MOUNT_LIBS="-lmount"
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78 | MOUNT_CFLAGS="-I/tools/include/libmount"
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79 | cc_cv_CFLAGS__flto=no
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80 | XSLTPROC="/usr/bin/xsltproc"</literal>
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81 | EOF</userinput></screen>
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82 |
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83 | <para>LTO is disabled by default because it causes
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84 | <command>systemd</command> and other auxiliary programs to link to
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85 | <filename class="libraryfile">libgcc_s.so</filename>, slows the build down
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86 | and makes the compiled code larger.</para>
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87 |
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88 | <para>Prepare systemd for compilation:</para>
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89 |
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90 | <screen><userinput remap="configure">./configure --prefix=/usr \
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91 | --sysconfdir=/etc \
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92 | --localstatedir=/var \
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93 | --config-cache \
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94 | --with-rootprefix= \
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95 | --with-rootlibdir=/lib \
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96 | --enable-split-usr \
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97 | --disable-firstboot \
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98 | --disable-ldconfig \
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99 | --disable-sysusers \
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100 | --without-python \
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101 | --with-default-dnssec=no \
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102 | --docdir=/usr/share/doc/systemd-&systemd-version;</userinput></screen>
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103 |
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104 | <variablelist>
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105 | <title>The meaning of the configure options:</title>
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106 |
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107 | <varlistentry>
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108 | <term><parameter>--config-cache</parameter></term>
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109 | <listitem>
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110 | <para>This switch tells the build system to use
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111 | the <filename>config.cache</filename> file which
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112 | was created earlier.</para>
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113 | </listitem>
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114 | </varlistentry>
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115 |
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116 | <varlistentry>
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117 | <term><parameter>--with-root*</parameter></term>
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118 | <listitem>
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119 | <para>These switches ensure that core programs and
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120 | shared libraries are installed in the subdirectories
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121 | of the root partition.</para>
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122 | </listitem>
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123 | </varlistentry>
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124 |
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125 | <varlistentry>
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126 | <term><parameter>--enable-split-usr</parameter></term>
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127 | <listitem>
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128 | <para>This switch ensures that systemd will work on
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129 | systems where /bin, /lib and /sbin directories are not
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130 | symlinks to their /usr counterparts.</para>
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131 | </listitem>
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132 | </varlistentry>
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133 |
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134 | <varlistentry>
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135 | <term><parameter>--without-python</parameter></term>
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136 | <listitem>
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137 | <para>This switch prevents <command>configure</command>
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138 | from trying to use Python which isn't built
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139 | in LFS.</para>
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140 | </listitem>
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141 | </varlistentry>
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142 |
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143 | <varlistentry>
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144 | <term><parameter>--disable-firstboot</parameter></term>
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145 | <listitem>
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146 | <para>This switch prevents installation of systemd
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147 | services responsible for setting up the system for
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148 | the first time. They are not useful for LFS because
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149 | everything is done manually.</para>
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150 | </listitem>
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151 | </varlistentry>
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152 |
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153 | <varlistentry>
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154 | <term><parameter>--disable-ldconfig</parameter></term>
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155 | <listitem>
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156 | <para>This switch prevents installation of a systemd
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157 | unit that runs <command>ldconfig</command> at
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158 | boot, making the boot time longer. Remove it if the
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159 | described feature is desired, even though it's not
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160 | useful for source distributions such as LFS.</para>
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161 | </listitem>
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162 | </varlistentry>
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163 |
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164 | <varlistentry>
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165 | <term><parameter>--disable-sysusers</parameter></term>
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166 | <listitem>
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167 | <para>This switch prevents installation of systemd
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168 | services responsible for setting up the
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169 | <filename>/etc/group</filename> and
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170 | <filename>/etc/passwd</filename> files. Both files
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171 | were created early in this chapter.</para>
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172 | </listitem>
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173 | </varlistentry>
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174 |
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175 | <varlistentry>
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176 | <term><parameter>--with-default-dnssec=no</parameter></term>
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177 | <listitem>
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178 | <para>This switch turns off the experimental DNSSEC suport.</para>
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179 | </listitem>
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180 | </varlistentry>
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181 |
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182 | </variablelist>
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183 |
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184 | <para>Compile the package:</para>
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185 |
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186 | <screen><userinput remap="make">make LIBRARY_PATH=/tools/lib</userinput></screen>
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187 |
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188 | <para>This package has a test suite, but it can only be run after the
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189 | package has been installed.</para>
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190 |
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191 | <para>Install the package:</para>
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192 |
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193 | <screen><userinput remap="install">make LD_LIBRARY_PATH=/tools/lib install</userinput></screen>
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194 |
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195 | <para>Move NSS libraries to <filename class="directory">/lib</filename>:</para>
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196 |
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197 | <screen><userinput remap="install">mv -v /usr/lib/libnss_{myhostname,mymachines,resolve}.so.2 /lib</userinput></screen>
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198 |
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199 | <para>Remove an unnecessary directory:</para>
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200 |
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201 | <screen><userinput remap="install">rm -rfv /usr/lib/rpm</userinput></screen>
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202 |
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203 | <para>Create the Sysvinit compatibility symlinks, so systemd is used
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204 | as the default init system:</para>
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205 |
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206 | <screen><userinput remap="install">for tool in runlevel reboot shutdown poweroff halt telinit; do
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207 | ln -sfv ../bin/systemctl /sbin/${tool}
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208 | done
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209 | ln -sfv ../lib/systemd/systemd /sbin/init</userinput></screen>
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210 |
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211 | <!--
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212 | <para>Remove a reference to a non-existent group:</para>
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213 |
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214 | <screen><userinput remap="install">sed -i "s:0775 root lock:0755 root root:g" /usr/lib/tmpfiles.d/legacy.conf</userinput></screen>
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215 | -->
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216 |
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217 | <para>Create the <filename>/etc/machine-id</filename> file needed by
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218 | <command>systemd-journald</command>:</para>
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219 |
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220 | <screen><userinput remap="install">systemd-machine-id-setup</userinput></screen>
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221 |
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222 | <para>Since the testsuite largely depends on the host system kernel
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223 | configuration, some tests may fail. It also needs a modification in
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224 | order not to look for a program that will be installed by Util-Linux
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225 | package later in this chapter. To test the results, issue:</para>
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226 |
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227 | <screen><userinput remap="test">sed -i "s:minix:ext4:g" src/test/test-path-util.c
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228 | make LD_LIBRARY_PATH=/tools/lib -k check</userinput></screen>
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229 |
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230 | </sect2>
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231 |
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232 | <sect2 id="contents-systemd" role="content">
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233 | <title>Contents of systemd</title>
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234 |
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235 | <segmentedlist>
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236 | <segtitle>Installed programs</segtitle>
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237 | <segtitle>Installed libraries</segtitle>
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238 | <segtitle>Installed directories</segtitle>
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239 |
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240 | <seglistitem>
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241 | <seg>bootctl, busctl, coredumpctl, halt, hostnamectl, init, journalctl,
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242 | kernel-install, localectl, loginctl, machinectl, networkctl, poweroff,
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243 | reboot, runlevel, shutdown, systemctl, systemd-analyze,
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244 | systemd-ask-password, systemd-cat, systemd-cgls, systemd-cgtop,
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245 | systemd-delta, systemd-detect-virt, systemd-escape, systemd-hwdb,
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246 | systemd-inhibit, systemd-machine-id-setup, systemd-notify,
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247 | systemd-nspawn, systemd-path, systemd-resolve, systemd-run,
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248 | systemd-stdio-bridge, systemd-tmpfiles, systemd-tty-ask-password-agent,
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249 | telinit, timedatectl, and udevadm</seg>
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250 | <seg>libnss_myhostname.so.2, libnss_mymachines.so.2,
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251 | libnss_resolve.so.2, libsystemd.so, and libudev.so</seg>
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252 | <seg>/etc/binfmt.d, /etc/init.d, /etc/kernel, /etc/modules-load.d,
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253 | /etc/sysctl.d, /etc/systemd, /etc/tmpfiles.d, /etc/udev,
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254 | /etc/xdg/systemd, /lib/systemd, /lib/udev, /usr/include/systemd,
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255 | /usr/lib/binfmt.d, /usr/lib/kernel, /usr/lib/modules-load.d,
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256 | /usr/lib/sysctl.d, /usr/lib/systemd, /usr/lib/tmpfiles.d,
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257 | /usr/share/doc/systemd-&systemd-version;, /usr/share/factory,
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258 | /usr/share/systemd, /var/lib/systemd, and /var/log/journal</seg>
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259 | </seglistitem>
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260 | </segmentedlist>
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261 |
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262 | <variablelist>
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263 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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264 | <?dbfo list-presentation="list"?>
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265 | <?dbhtml list-presentation="table"?>
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266 |
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267 | <varlistentry id="bootctl">
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268 | <term><command>bootctl</command></term>
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269 | <listitem>
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270 | <para>used to query the firmware and boot manager settings</para>
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271 | <indexterm zone="ch-system-systemd bootctl">
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272 | <primary sortas="b-bootctl">bootctl</primary>
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273 | </indexterm>
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274 | </listitem>
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275 | </varlistentry>
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276 |
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277 | <varlistentry id="busctl">
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278 | <term><command>busctl</command></term>
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279 | <listitem>
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280 | <para>Used to introspect and monitor the D-Bus bus</para>
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281 | <indexterm zone="ch-system-systemd busctl">
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282 | <primary sortas="b-busctl">busctl</primary>
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283 | </indexterm>
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284 | </listitem>
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285 | </varlistentry>
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286 |
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287 | <varlistentry id="coredumpctl">
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288 | <term><command>coredumpctl</command></term>
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289 | <listitem>
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290 | <para>Used to retrieve coredumps from the systemd Journal</para>
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291 | <indexterm zone="ch-system-systemd coredumpctl">
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292 | <primary sortas="b-coredumpctl">coredumpctl</primary>
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293 | </indexterm>
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294 | </listitem>
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295 | </varlistentry>
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296 |
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297 | <varlistentry id="halt">
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298 | <term><command>halt</command></term>
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299 | <listitem>
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300 | <para>Normally invokes <command>shutdown</command> with the
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301 | <parameter>-h</parameter> option, except when already in run-level 0,
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302 | then it tells the kernel to halt the system; it notes in the
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303 | file <filename>/var/log/wtmp</filename> that the system is being
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304 | brought down</para>
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305 | <indexterm zone="ch-system-systemd halt">
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306 | <primary sortas="b-halt">halt</primary>
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307 | </indexterm>
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308 | </listitem>
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309 | </varlistentry>
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310 |
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311 | <varlistentry id="hostnamectl">
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312 | <term><command>hostnamectl</command></term>
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313 | <listitem>
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314 | <para>Used to query and change the system hostname and related
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315 | settings</para>
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316 | <indexterm zone="ch-system-systemd hostnamectl">
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317 | <primary sortas="b-hostnamectl">hostnamectl</primary>
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318 | </indexterm>
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319 | </listitem>
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320 | </varlistentry>
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321 |
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322 | <varlistentry id="init">
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323 | <term><command>init</command></term>
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324 | <listitem>
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325 | <para>The first process to be started when the kernel has initialized
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326 | the hardware which takes over the boot process and starts all the
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327 | proceses it is instructed to</para>
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328 | <indexterm zone="ch-system-systemd init">
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329 | <primary sortas="b-init">init</primary>
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330 | </indexterm>
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331 | </listitem>
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332 | </varlistentry>
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333 |
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334 | <varlistentry id="journalctl">
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335 | <term><command>journalctl</command></term>
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336 | <listitem>
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337 | <para>Used to query the contents of the systemd Journal</para>
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338 | <indexterm zone="ch-system-systemd journalctl">
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339 | <primary sortas="b-journalctl">journalctl</primary>
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340 | </indexterm>
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341 | </listitem>
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342 | </varlistentry>
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343 |
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344 | <varlistentry id="kernel-install">
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345 | <term><command>kernel-install</command></term>
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346 | <listitem>
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347 | <para>Used to add and remove kernel and initramfs images to and
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348 | from /boot</para>
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349 | <indexterm zone="ch-system-systemd kernel-install">
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350 | <primary sortas="b-kernel-install">kernel-install</primary>
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351 | </indexterm>
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352 | </listitem>
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353 | </varlistentry>
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354 |
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355 | <varlistentry id="localectl">
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356 | <term><command>localectl</command></term>
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357 | <listitem>
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358 | <para>Used to query and change the system locale and keyboard layout
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359 | settings</para>
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360 | <indexterm zone="ch-system-systemd localectl">
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361 | <primary sortas="b-localectl">localectl</primary>
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362 | </indexterm>
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363 | </listitem>
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364 | </varlistentry>
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365 |
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366 | <varlistentry id="loginctl">
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367 | <term><command>loginctl</command></term>
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368 | <listitem>
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369 | <para>Used to introspect and control the state of the systemd Login
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370 | Manager</para>
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371 | <indexterm zone="ch-system-systemd loginctl">
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372 | <primary sortas="b-loginctl">loginctl</primary>
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373 | </indexterm>
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374 | </listitem>
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375 | </varlistentry>
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376 |
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377 | <varlistentry id="machinectl">
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378 | <term><command>machinectl</command></term>
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379 | <listitem>
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380 | <para>Used to introspect and control the state of the systemd Virtual
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381 | Machine and Container Registration Manager</para>
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382 | <indexterm zone="ch-system-systemd machinectl">
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383 | <primary sortas="b-machinectl">machinectl</primary>
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384 | </indexterm>
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385 | </listitem>
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386 | </varlistentry>
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387 |
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388 | <varlistentry id="networkctl">
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389 | <term><command>networkctl</command></term>
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390 | <listitem>
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391 | <para>Used to introspect the state of the network links as seen by
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392 | systemd-networkd</para>
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393 | <indexterm zone="ch-system-systemd networkctl">
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394 | <primary sortas="b-networkctl">networkctl</primary>
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395 | </indexterm>
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396 | </listitem>
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397 | </varlistentry>
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398 |
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399 | <varlistentry id="poweroff">
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400 | <term><command>poweroff</command></term>
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401 | <listitem>
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402 | <para>Tells the kernel to halt the system and switch off the computer
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403 | (see <command>halt</command>)</para>
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404 | <indexterm zone="ch-system-systemd poweroff">
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405 | <primary sortas="b-poweroff">poweroff</primary>
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406 | </indexterm>
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407 | </listitem>
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408 | </varlistentry>
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409 |
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410 | <varlistentry id="reboot">
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411 | <term><command>reboot</command></term>
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412 | <listitem>
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413 | <para>Tells the kernel to reboot the system (see
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414 | <command>halt</command>)</para>
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415 | <indexterm zone="ch-system-systemd reboot">
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416 | <primary sortas="b-reboot">reboot</primary>
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417 | </indexterm>
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418 | </listitem>
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419 | </varlistentry>
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420 |
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421 | <varlistentry id="runlevel">
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422 | <term><command>runlevel</command></term>
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423 | <listitem>
|
---|
424 | <para>Reports the previous and the current run-level, as noted in the
|
---|
425 | last run-level record in <filename>/var/run/utmp</filename></para>
|
---|
426 | <indexterm zone="ch-system-systemd runlevel">
|
---|
427 | <primary sortas="b-runlevel">runlevel</primary>
|
---|
428 | </indexterm>
|
---|
429 | </listitem>
|
---|
430 | </varlistentry>
|
---|
431 |
|
---|
432 | <varlistentry id="shutdown">
|
---|
433 | <term><command>shutdown</command></term>
|
---|
434 | <listitem>
|
---|
435 | <para>Brings the system down in a secure way, signaling all processes
|
---|
436 | and notifying all logged-in users</para>
|
---|
437 | <indexterm zone="ch-system-systemd shutdown">
|
---|
438 | <primary sortas="b-shutdown">shutdown</primary>
|
---|
439 | </indexterm>
|
---|
440 | </listitem>
|
---|
441 | </varlistentry>
|
---|
442 |
|
---|
443 | <varlistentry id="systemctl">
|
---|
444 | <term><command>systemctl</command></term>
|
---|
445 | <listitem>
|
---|
446 | <para>Used to introspect and control the state of the systemd system
|
---|
447 | and service manager</para>
|
---|
448 | <indexterm zone="ch-system-systemd systemctl">
|
---|
449 | <primary sortas="b-systemctl">systemctl</primary>
|
---|
450 | </indexterm>
|
---|
451 | </listitem>
|
---|
452 | </varlistentry>
|
---|
453 |
|
---|
454 | <varlistentry id="systemd-analyze">
|
---|
455 | <term><command>systemd-analyze</command></term>
|
---|
456 | <listitem>
|
---|
457 | <para>Used to determine system boot-up performance of the current
|
---|
458 | boot</para>
|
---|
459 | <indexterm zone="ch-system-systemd systemd-analyze">
|
---|
460 | <primary sortas="b-systemd-analyze">systemd-analyze</primary>
|
---|
461 | </indexterm>
|
---|
462 | </listitem>
|
---|
463 | </varlistentry>
|
---|
464 |
|
---|
465 | <varlistentry id="systemd-ask-password">
|
---|
466 | <term><command>systemd-ask-password</command></term>
|
---|
467 | <listitem>
|
---|
468 | <para>Used to query a system password or passphrase from the user,
|
---|
469 | using a question message specified on the command line</para>
|
---|
470 | <indexterm zone="ch-system-systemd systemd-ask-password">
|
---|
471 | <primary sortas="b-systemd-ask-password">systemd-ask-password</primary>
|
---|
472 | </indexterm>
|
---|
473 | </listitem>
|
---|
474 | </varlistentry>
|
---|
475 |
|
---|
476 | <varlistentry id="systemd-cat">
|
---|
477 | <term><command>systemd-cat</command></term>
|
---|
478 | <listitem>
|
---|
479 | <para>Used to connect STDOUT and STDERR of a process with the Journal
|
---|
480 | </para>
|
---|
481 | <indexterm zone="ch-system-systemd systemd-cat">
|
---|
482 | <primary sortas="b-systemd-cat">systemd-cat</primary>
|
---|
483 | </indexterm>
|
---|
484 | </listitem>
|
---|
485 | </varlistentry>
|
---|
486 |
|
---|
487 | <varlistentry id="systemd-cgls">
|
---|
488 | <term><command>systemd-cgls</command></term>
|
---|
489 | <listitem>
|
---|
490 | <para>Recursively shows the contents of the selected Linux control
|
---|
491 | group hierarchy in a tree</para>
|
---|
492 | <indexterm zone="ch-system-systemd systemd-cgls">
|
---|
493 | <primary sortas="b-systemd-cgls">systemd-cgls</primary>
|
---|
494 | </indexterm>
|
---|
495 | </listitem>
|
---|
496 | </varlistentry>
|
---|
497 |
|
---|
498 | <varlistentry id="systemd-cgtop">
|
---|
499 | <term><command>systemd-cgtop</command></term>
|
---|
500 | <listitem>
|
---|
501 | <para>Shows the top control groups of the local Linux control group
|
---|
502 | hierarchy, ordered by their CPU, memory and disk I/O load</para>
|
---|
503 | <indexterm zone="ch-system-systemd systemd-cgtop">
|
---|
504 | <primary sortas="b-systemd-cgtop">systemd-cgtop</primary>
|
---|
505 | </indexterm>
|
---|
506 | </listitem>
|
---|
507 | </varlistentry>
|
---|
508 |
|
---|
509 | <varlistentry id="systemd-delta">
|
---|
510 | <term><command>systemd-delta</command></term>
|
---|
511 | <listitem>
|
---|
512 | <para>Used to identify and compare configuration files in
|
---|
513 | <filename class="directory">/etc</filename> that override default
|
---|
514 | counterparts in <filename class="directory">/usr</filename></para>
|
---|
515 | <indexterm zone="ch-system-systemd systemd-delta">
|
---|
516 | <primary sortas="b-systemd-delta">systemd-delta</primary>
|
---|
517 | </indexterm>
|
---|
518 | </listitem>
|
---|
519 | </varlistentry>
|
---|
520 |
|
---|
521 | <varlistentry id="systemd-detect-virt">
|
---|
522 | <term><command>systemd-detect-virt</command></term>
|
---|
523 | <listitem>
|
---|
524 | <para>Detects execution in a virtualized environment</para>
|
---|
525 | <indexterm zone="ch-system-systemd systemd-detect-virt">
|
---|
526 | <primary sortas="b-systemd-detect-virt">systemd-detect-virt</primary>
|
---|
527 | </indexterm>
|
---|
528 | </listitem>
|
---|
529 | </varlistentry>
|
---|
530 |
|
---|
531 | <varlistentry id="systemd-escape">
|
---|
532 | <term><command>systemd-escape</command></term>
|
---|
533 | <listitem>
|
---|
534 | <para>Used to escape strings for inclusion in systemd unit
|
---|
535 | names</para>
|
---|
536 | <indexterm zone="ch-system-systemd systemd-escape">
|
---|
537 | <primary sortas="b-systemd-escape">systemd-escape</primary>
|
---|
538 | </indexterm>
|
---|
539 | </listitem>
|
---|
540 | </varlistentry>
|
---|
541 |
|
---|
542 | <varlistentry id="systemd-hwdb">
|
---|
543 | <term><command>systemd-hwdb</command></term>
|
---|
544 | <listitem>
|
---|
545 | <para>Used to manage hardware database (hwdb)</para>
|
---|
546 | <indexterm zone="ch-system-systemd systemd-hwdb">
|
---|
547 | <primary sortas="b-systemd-hwdb">systemd-hwdb</primary>
|
---|
548 | </indexterm>
|
---|
549 | </listitem>
|
---|
550 | </varlistentry>
|
---|
551 |
|
---|
552 | <varlistentry id="systemd-inhibit">
|
---|
553 | <term><command>systemd-inhibit</command></term>
|
---|
554 | <listitem>
|
---|
555 | <para>Used to execute a program with a shutdown, sleep or idle
|
---|
556 | inhibitor lock taken</para>
|
---|
557 | <indexterm zone="ch-system-systemd systemd-inhibit">
|
---|
558 | <primary sortas="b-systemd-inhibit">systemd-inhibit</primary>
|
---|
559 | </indexterm>
|
---|
560 | </listitem>
|
---|
561 | </varlistentry>
|
---|
562 |
|
---|
563 | <varlistentry id="systemd-machine-id-setup">
|
---|
564 | <term><command>systemd-machine-id-setup</command></term>
|
---|
565 | <listitem>
|
---|
566 | <para>Used by system installer tools to initialize the machine ID
|
---|
567 | stored in <filename>/etc/machine-id</filename> at install time with a
|
---|
568 | randomly generated ID</para>
|
---|
569 | <indexterm zone="ch-system-systemd systemd-machine-id-setup">
|
---|
570 | <primary sortas="b-systemd-machine-id-setup">systemd-machine-id-setup</primary>
|
---|
571 | </indexterm>
|
---|
572 | </listitem>
|
---|
573 | </varlistentry>
|
---|
574 |
|
---|
575 | <varlistentry id="systemd-notify">
|
---|
576 | <term><command>systemd-notify</command></term>
|
---|
577 | <listitem>
|
---|
578 | <para>Used by daemon scripts to notify the init system about status
|
---|
579 | changes</para>
|
---|
580 | <indexterm zone="ch-system-systemd systemd-notify">
|
---|
581 | <primary sortas="b-systemd-notify">systemd-notify</primary>
|
---|
582 | </indexterm>
|
---|
583 | </listitem>
|
---|
584 | </varlistentry>
|
---|
585 |
|
---|
586 | <varlistentry id="systemd-nspawn">
|
---|
587 | <term><command>systemd-nspawn</command></term>
|
---|
588 | <listitem>
|
---|
589 | <para>Used to run a command or OS in a light-weight namespace
|
---|
590 | container</para>
|
---|
591 | <indexterm zone="ch-system-systemd systemd-nspawn">
|
---|
592 | <primary sortas="b-systemd-nspawn">systemd-nspawn</primary>
|
---|
593 | </indexterm>
|
---|
594 | </listitem>
|
---|
595 | </varlistentry>
|
---|
596 |
|
---|
597 | <varlistentry id="systemd-path">
|
---|
598 | <term><command>systemd-path</command></term>
|
---|
599 | <listitem>
|
---|
600 | <para>Used to query system and user paths</para>
|
---|
601 | <indexterm zone="ch-system-systemd systemd-path">
|
---|
602 | <primary sortas="b-systemd-path">systemd-path</primary>
|
---|
603 | </indexterm>
|
---|
604 | </listitem>
|
---|
605 | </varlistentry>
|
---|
606 |
|
---|
607 | <varlistentry id="systemd-resolve">
|
---|
608 | <term><command>systemd-resolve</command></term>
|
---|
609 | <listitem>
|
---|
610 | <para>Used to resolve domain names, IPV4 and IPv6 addresses, DNS
|
---|
611 | resource records, and services</para>
|
---|
612 | <indexterm zone="ch-system-systemd systemd-resolve">
|
---|
613 | <primary sortas="b-systemd-resolve">systemd-resolve</primary>
|
---|
614 | </indexterm>
|
---|
615 | </listitem>
|
---|
616 | </varlistentry>
|
---|
617 |
|
---|
618 | <varlistentry id="systemd-run">
|
---|
619 | <term><command>systemd-run</command></term>
|
---|
620 | <listitem>
|
---|
621 | <para>Used to create and start a transient .service or a .scope unit
|
---|
622 | and run the specified command in it</para>
|
---|
623 | <indexterm zone="ch-system-systemd systemd-run">
|
---|
624 | <primary sortas="b-systemd-run">systemd-run</primary>
|
---|
625 | </indexterm>
|
---|
626 | </listitem>
|
---|
627 | </varlistentry>
|
---|
628 |
|
---|
629 | <!-- <varlistentry id="systemd-stdio-bridge">
|
---|
630 | <term><command>systemd-stdio-bridge</command></term>
|
---|
631 | <listitem>
|
---|
632 | <para>To be completed</para>
|
---|
633 | <indexterm zone="ch-system-systemd systemd-stdio-bridge">
|
---|
634 | <primary sortas="b-systemd-stdio-bridge">systemd-stdio-bridge</primary>
|
---|
635 | </indexterm>
|
---|
636 | </listitem>
|
---|
637 | </varlistentry> -->
|
---|
638 |
|
---|
639 | <varlistentry id="systemd-tmpfiles">
|
---|
640 | <term><command>systemd-tmpfiles</command></term>
|
---|
641 | <listitem>
|
---|
642 | <para>Creates, deletes and cleans up volatile and temporary files and
|
---|
643 | directories, based on the configuration file format and location
|
---|
644 | specified in
|
---|
645 | <filename class="directory">tmpfiles.d</filename> directories</para>
|
---|
646 | <indexterm zone="ch-system-systemd systemd-tmpfiles">
|
---|
647 | <primary sortas="b-systemd-tmpfiles">systemd-tmpfiles</primary>
|
---|
648 | </indexterm>
|
---|
649 | </listitem>
|
---|
650 | </varlistentry>
|
---|
651 |
|
---|
652 | <varlistentry id="systemd-tty-ask-password-agent">
|
---|
653 | <term><command>systemd-tty-ask-password-agent</command></term>
|
---|
654 | <listitem>
|
---|
655 | <para>Used to list or process pending systemd password requests</para>
|
---|
656 | <indexterm zone="ch-system-systemd systemd-tty-ask-password-agent">
|
---|
657 | <primary sortas="b-systemd-tty-ask-password-agent">systemd-tty-ask-password-agent</primary>
|
---|
658 | </indexterm>
|
---|
659 | </listitem>
|
---|
660 | </varlistentry>
|
---|
661 |
|
---|
662 | <varlistentry id="telinit">
|
---|
663 | <term><command>telinit</command></term>
|
---|
664 | <listitem>
|
---|
665 | <para>Tells <command>init</command> which run-level to change
|
---|
666 | to</para>
|
---|
667 | <indexterm zone="ch-system-systemd telinit">
|
---|
668 | <primary sortas="b-telinit">telinit</primary>
|
---|
669 | </indexterm>
|
---|
670 | </listitem>
|
---|
671 | </varlistentry>
|
---|
672 |
|
---|
673 | <varlistentry id="timedatectl">
|
---|
674 | <term><command>timedatectl</command></term>
|
---|
675 | <listitem>
|
---|
676 | <para>Used to query and change the system clock and its settings
|
---|
677 | </para>
|
---|
678 | <indexterm zone="ch-system-systemd timedatectl">
|
---|
679 | <primary sortas="b-timedatectl">timedatectl</primary>
|
---|
680 | </indexterm>
|
---|
681 | </listitem>
|
---|
682 | </varlistentry>
|
---|
683 |
|
---|
684 | <varlistentry id="udevadm">
|
---|
685 | <term><command>udevadm</command></term>
|
---|
686 | <listitem>
|
---|
687 | <para>Generic Udev administration tool: controls the udevd daemon,
|
---|
688 | provides info from the Udev database, monitors uevents, waits for
|
---|
689 | uevents to finish, tests Udev configuration, and triggers uevents
|
---|
690 | for a given device</para>
|
---|
691 | <indexterm zone="ch-system-systemd udevadm">
|
---|
692 | <primary sortas="b-udevadm">udevadm</primary>
|
---|
693 | </indexterm>
|
---|
694 | </listitem>
|
---|
695 | </varlistentry>
|
---|
696 |
|
---|
697 | <varlistentry id="libsystemd">
|
---|
698 | <term><filename class="libraryfile">libsystemd</filename></term>
|
---|
699 | <listitem>
|
---|
700 | <para>systemd utility library</para>
|
---|
701 | <indexterm zone="ch-system-systemd libsystemd">
|
---|
702 | <primary sortas="c-libsystemd">libsystemd</primary>
|
---|
703 | </indexterm>
|
---|
704 | </listitem>
|
---|
705 | </varlistentry>
|
---|
706 |
|
---|
707 | <varlistentry id="libudev">
|
---|
708 | <term><filename class="libraryfile">libudev</filename></term>
|
---|
709 | <listitem>
|
---|
710 | <para>A library to access Udev device information</para>
|
---|
711 | <indexterm zone="ch-system-systemd libudev">
|
---|
712 | <primary sortas="c-libudev">libudev</primary>
|
---|
713 | </indexterm>
|
---|
714 | </listitem>
|
---|
715 | </varlistentry>
|
---|
716 |
|
---|
717 | </variablelist>
|
---|
718 |
|
---|
719 | </sect2>
|
---|
720 |
|
---|
721 | </sect1>
|
---|