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-shadow" role="wrap">
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9 | <?dbhtml filename="shadow.html"?>
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10 |
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11 | <sect1info condition="script">
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12 | <productname>shadow</productname>
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13 | <productnumber>&shadow-version;</productnumber>
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14 | <address>&shadow-url;</address>
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15 | </sect1info>
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16 |
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17 | <title>Shadow-&shadow-version;</title>
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18 |
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19 | <indexterm zone="ch-system-shadow">
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20 | <primary sortas="a-Shadow">Shadow</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 Shadow package contains programs for handling passwords in a secure
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27 | way.</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>&shadow-fin-sbu;</seg>
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35 | <seg>&shadow-fin-du;</seg>
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36 | </seglistitem>
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37 | </segmentedlist>
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38 |
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39 | </sect2>
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40 |
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41 | <sect2 role="installation">
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42 | <title>Installation of Shadow</title>
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43 |
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44 | <note>
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45 | <para>If you would like to enforce the use of strong passwords, refer to
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46 | <ulink url="&blfs-book;postlfs/cracklib.html"/> for installing
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47 | CrackLib prior to building Shadow. Then add
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48 | <parameter>--with-libcrack</parameter> to the <command>configure</command>
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49 | command below.</para>
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50 | </note>
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51 |
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52 | <para>Disable the installation of the <command>groups</command> program
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53 | and its man pages, as Coreutils provides a better version. Also,
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54 | prevent the installation of manual pages that were already installed in
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55 | <xref linkend="ch-system-man-pages"/>:</para>
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56 |
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57 | <screen><userinput remap="pre">sed -i 's/groups$(EXEEXT) //' src/Makefile.in
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58 | find man -name Makefile.in -exec sed -i 's/groups\.1 / /' {} \;
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59 | find man -name Makefile.in -exec sed -i 's/getspnam\.3 / /' {} \;
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60 | find man -name Makefile.in -exec sed -i 's/passwd\.5 / /' {} \;</userinput></screen>
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61 |
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62 | <para id="shadow-login_defs">Instead of using the default
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63 | <emphasis>crypt</emphasis> method, use the more secure
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64 | <emphasis>SHA-512</emphasis> method of password encryption, which also
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65 | allows passwords longer than 8 characters. It is also necessary to change
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66 | the obsolete <filename class="directory">/var/spool/mail</filename> location
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67 | for user mailboxes that Shadow uses by default to the <filename
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68 | class="directory">/var/mail</filename> location used currently. And,
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69 | get rid of <filename class="directory">/bin</filename> and
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70 | <filename class="directory">/sbin</filename> from <envar>PATH</envar>,
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71 | since they are simply symlinks to their counterpart in
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72 | <filename class="directory">/usr</filename>.</para>
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73 |
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74 | <note>
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75 | <para>If <filename class="directory">/bin</filename> and/or
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76 | <filename class="directory">/sbin</filename> are preferred to be
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77 | left over in <envar>PATH</envar> for some reason, modify
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78 | <envar>PATH</envar> in <filename>.bashrc</filename> after LFS is
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79 | built.</para>
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80 | </note>
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81 |
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82 | <screen><userinput remap="pre">sed -e 's:#ENCRYPT_METHOD DES:ENCRYPT_METHOD SHA512:' \
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83 | -e 's:/var/spool/mail:/var/mail:' \
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84 | -e '/PATH=/{s@/sbin:@@;s@/bin:@@}' \
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85 | -i etc/login.defs</userinput></screen>
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86 |
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87 | <note>
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88 | <para>If you chose to build Shadow with Cracklib support, run the following:</para>
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89 |
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90 | <screen role="nodump"><userinput>sed -i 's:DICTPATH.*:DICTPATH\t/lib/cracklib/pw_dict:' etc/login.defs</userinput></screen>
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91 | </note>
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92 | <!--
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93 | <para>Make a minor change to make the first group number generated
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94 | by useradd 1000:</para>
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95 |
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96 | <screen><userinput remap="pre">sed -i 's/1000/999/' etc/useradd</userinput></screen>
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97 | -->
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98 | <!--
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99 | <para>Fix a simple programming error by modifying a file with following command:</para>
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100 |
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101 | <screen><userinput remap="pre">sed -e "224s/rounds/min_rounds/" -i libmisc/salt.c</userinput></screen>
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102 | -->
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103 | <para>Prepare Shadow for compilation:</para>
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104 |
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105 | <screen><userinput remap="configure">touch /usr/bin/passwd
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106 | ./configure --sysconfdir=/etc \
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107 | --with-group-name-max-length=32</userinput></screen>
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108 |
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109 | <variablelist>
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110 | <title>The meaning of the configure option:</title>
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111 |
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112 | <varlistentry>
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113 | <term><command>touch /usr/bin/passwd</command></term>
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114 | <listitem>
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115 | <para>The file <filename>/usr/bin/passwd</filename> needs
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116 | to exist because its location is hardcoded in some programs, and
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117 | if it does not exist, the default location is not right.</para>
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118 | </listitem>
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119 | </varlistentry>
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120 | <varlistentry>
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121 | <term><parameter>--with-group-name-max-length=32</parameter></term>
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122 | <listitem>
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123 | <para>The maximum user name is 32 characters. Make the maximum
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124 | group name the same.</para>
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125 | </listitem>
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126 | </varlistentry>
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127 |
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128 | </variablelist>
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129 |
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130 | <para>Compile the package:</para>
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131 |
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132 | <screen><userinput remap="make">make</userinput></screen>
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133 |
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134 | <para>This package does not come with a test suite.</para>
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135 |
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136 | <para>Install the package:</para>
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137 |
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138 | <screen><userinput remap="install">make exec_prefix=/usr install
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139 | make -C man install-man</userinput></screen>
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140 |
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141 | </sect2>
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142 |
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143 | <sect2 id="conf-shadow" role="configuration">
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144 | <title>Configuring Shadow</title>
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145 |
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146 | <indexterm zone="conf-shadow">
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147 | <primary sortas="a-Shadow">Shadow</primary>
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148 | <secondary>configuring</secondary>
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149 | </indexterm>
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150 |
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151 | <para>This package contains utilities to add, modify, and delete users and
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152 | groups; set and change their passwords; and perform other administrative
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153 | tasks. For a full explanation of what <emphasis>password shadowing</emphasis>
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154 | means, see the <filename>doc/HOWTO</filename> file within the unpacked
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155 | source tree. If using Shadow support, keep in mind that programs which need
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156 | to verify passwords (display managers, FTP programs, pop3 daemons, etc.)
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157 | must be Shadow-compliant. That is, they need to be able to work with
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158 | shadowed passwords.</para>
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159 |
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160 | <para>To enable shadowed passwords, run the following command:</para>
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161 |
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162 | <screen><userinput>pwconv</userinput></screen>
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163 |
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164 | <para>To enable shadowed group passwords, run:</para>
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165 |
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166 | <screen><userinput>grpconv</userinput></screen>
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167 |
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168 | <para>Shadow's default configuration for the <command>useradd</command>
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169 | utility has a few caveats that need some explanation. First, the default
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170 | action for the <command>useradd</command> utility is to create the user and
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171 | a group of the same name as the user. By default the user ID (UID) and
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172 | group ID (GID) numbers will begin with 1000. This means if you don't pass
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173 | parameters to <command>useradd</command>, each user will be a member of a
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174 | unique group on the system. If this behavior is undesirable, you'll need
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175 | to pass one of the <parameter>-g</parameter> or <parameter>-N</parameter>
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176 | parameter to <command>useradd</command> or to change the setting of
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177 | <parameter>USERGROUPS_ENAB</parameter> in
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178 | <filename>/etc/login.defs</filename>. See <filename>useradd(8)</filename>
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179 | for more information.</para>
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180 |
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181 | <para>Second, to change the default parameters, the file
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182 | <filename>/etc/default/useradd</filename> needs to be created and taylored
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183 | to suit your particular needs. Create it with:</para>
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184 |
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185 | <screen><userinput>mkdir -p /etc/default
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186 | useradd -D --gid 999</userinput></screen>
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187 |
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188 | <variablelist>
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189 | <title><filename>/etc/default/useradd</filename> Parameter Explanations</title>
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190 |
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191 | <varlistentry>
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192 | <term><parameter>GROUP=999</parameter></term>
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193 | <listitem>
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194 | <para>This parameter sets the beginning of the group numbers used in
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195 | the <filename>/etc/group</filename> file. The particular value 999
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196 | comes from the <parameter>--gid</parameter> parameter above. You can
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197 | modify it to anything you desire.
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198 |
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199 | Note that <command>useradd</command> will never reuse a UID or GID.
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200 | If the number identified in this parameter is used, it will use the
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201 | next available number. Note also that if you don't have a group with
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202 | an ID equal to this number on your system the first time you use
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203 | <command>useradd</command> without the <parameter>-g</parameter>
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204 | parameter, you will get a message displayed on the terminal that
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205 | says: <computeroutput>useradd: unknown GID 999</computeroutput>,
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206 | although the account is correctly created. That is why we have
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207 | created the group <systemitem class="groupname">users</systemitem>
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208 | with this group ID in <xref linkend='ch-tools-createfiles'/>.</para>
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209 |
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210 | </listitem>
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211 | </varlistentry>
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212 | <varlistentry>
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213 | <term><parameter>CREATE_MAIL_SPOOL=yes</parameter></term>
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214 | <listitem>
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215 | <para>This parameter causes <command>useradd</command> to create a
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216 | mailbox file for the newly created user. <command>useradd</command>
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217 | will make the group ownership of this file to the
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218 | <systemitem class="groupname">mail</systemitem> group with 0660
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219 | permissions. If you would prefer that these mailbox files are not
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220 | created by <command>useradd</command>, issue the following
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221 | command:</para>
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222 |
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223 | <screen><userinput>sed -i '/MAIL/s/yes/no/' /etc/default/useradd</userinput></screen>
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224 | </listitem>
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225 | </varlistentry>
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226 |
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227 | </variablelist>
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228 |
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229 | </sect2>
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230 |
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231 | <sect2 role="configuration">
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232 | <title>Setting the root password</title>
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233 |
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234 | <para>Choose a password for user <emphasis>root</emphasis> and set it
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235 | by running:</para>
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236 |
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237 | <screen role="nodump"><userinput>passwd root</userinput></screen>
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238 |
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239 | </sect2>
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240 |
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241 | <sect2 id="contents-shadow" role="content">
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242 | <title>Contents of Shadow</title>
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243 |
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244 | <segmentedlist>
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245 | <segtitle>Installed programs</segtitle>
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246 | <segtitle>Installed directory</segtitle>
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247 |
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248 | <seglistitem>
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249 | <seg>chage, chfn, chgpasswd, chpasswd, chsh, expiry, faillog,
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250 | getsubids, gpasswd, groupadd, groupdel, groupmems, groupmod, grpck,
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251 | grpconv, grpunconv, lastlog, login, logoutd, newgidmap, newgrp,
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252 | newuidmap, newusers, nologin, passwd, pwck, pwconv, pwunconv,
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253 | sg (link to newgrp), su, useradd, userdel, usermod,
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254 | vigr (link to vipw), and vipw</seg>
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255 | <seg>/etc/default</seg>
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256 | </seglistitem>
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257 | </segmentedlist>
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258 |
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259 | <variablelist>
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260 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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261 | <?dbfo list-presentation="list"?>
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262 | <?dbhtml list-presentation="table"?>
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263 |
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264 | <varlistentry id="chage">
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265 | <term><command>chage</command></term>
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266 | <listitem>
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267 | <para>Used to change the maximum number of days between obligatory
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268 | password changes</para>
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269 | <indexterm zone="ch-system-shadow chage">
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270 | <primary sortas="b-chage">chage</primary>
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271 | </indexterm>
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272 | </listitem>
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273 | </varlistentry>
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274 |
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275 | <varlistentry id="chfn">
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276 | <term><command>chfn</command></term>
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277 | <listitem>
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278 | <para>Used to change a user's full name and other information</para>
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279 | <indexterm zone="ch-system-shadow chfn">
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280 | <primary sortas="b-chfn">chfn</primary>
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281 | </indexterm>
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282 | </listitem>
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283 | </varlistentry>
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284 |
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285 | <varlistentry id="chgpasswd">
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286 | <term><command>chgpasswd</command></term>
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287 | <listitem>
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288 | <para>Used to update group passwords in batch mode</para>
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289 | <indexterm zone="ch-system-shadow chgpasswd">
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290 | <primary sortas="b-chgpasswd">chgpasswd</primary>
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291 | </indexterm>
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292 | </listitem>
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293 | </varlistentry>
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294 |
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295 | <varlistentry id="chpasswd">
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296 | <term><command>chpasswd</command></term>
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297 | <listitem>
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298 | <para>Used to update user passwords in batch mode</para>
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299 | <indexterm zone="ch-system-shadow chpasswd">
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300 | <primary sortas="b-chpasswd">chpasswd</primary>
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301 | </indexterm>
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302 | </listitem>
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303 | </varlistentry>
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304 |
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305 | <varlistentry id="chsh">
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306 | <term><command>chsh</command></term>
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307 | <listitem>
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308 | <para>Used to change a user's default login shell</para>
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309 | <indexterm zone="ch-system-shadow chsh">
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310 | <primary sortas="b-chsh">chsh</primary>
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311 | </indexterm>
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312 | </listitem>
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313 | </varlistentry>
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314 |
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315 | <varlistentry id="expiry">
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316 | <term><command>expiry</command></term>
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317 | <listitem>
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318 | <para>Checks and enforces the current password expiration policy</para>
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319 | <indexterm zone="ch-system-shadow expiry">
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320 | <primary sortas="b-expiry">expiry</primary>
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321 | </indexterm>
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322 | </listitem>
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323 | </varlistentry>
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324 |
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325 | <varlistentry id="faillog">
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326 | <term><command>faillog</command></term>
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327 | <listitem>
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328 | <para>Is used to examine the log of login failures, to set a maximum
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329 | number of failures before an account is blocked, or to reset the
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330 | failure count</para>
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331 | <indexterm zone="ch-system-shadow faillog">
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332 | <primary sortas="b-faillog">faillog</primary>
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333 | </indexterm>
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334 | </listitem>
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335 | </varlistentry>
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336 |
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337 | <varlistentry id="getsubids">
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338 | <term><command>getsubids</command></term>
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339 | <listitem>
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340 | <para>Is used to list the subordinate id ranges for a user</para>
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341 | <indexterm zone="ch-system-shadow getsubids">
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342 | <primary sortas="b-getsubids">getsubids</primary>
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343 | </indexterm>
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344 | </listitem>
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345 | </varlistentry>
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346 |
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347 | <varlistentry id="gpasswd">
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348 | <term><command>gpasswd</command></term>
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349 | <listitem>
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350 | <para>Is used to add and delete members and administrators to
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351 | groups</para>
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352 | <indexterm zone="ch-system-shadow gpasswd">
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353 | <primary sortas="b-gpasswd">gpasswd</primary>
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354 | </indexterm>
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355 | </listitem>
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356 | </varlistentry>
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357 |
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358 | <varlistentry id="groupadd">
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359 | <term><command>groupadd</command></term>
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360 | <listitem>
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361 | <para>Creates a group with the given name</para>
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362 | <indexterm zone="ch-system-shadow groupadd">
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363 | <primary sortas="b-groupadd">groupadd</primary>
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364 | </indexterm>
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365 | </listitem>
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366 | </varlistentry>
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367 |
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368 | <varlistentry id="groupdel">
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369 | <term><command>groupdel</command></term>
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370 | <listitem>
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371 | <para>Deletes the group with the given name</para>
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372 | <indexterm zone="ch-system-shadow groupdel">
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373 | <primary sortas="b-groupdel">groupdel</primary>
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374 | </indexterm>
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375 | </listitem>
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376 | </varlistentry>
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377 |
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378 | <varlistentry id="groupmems">
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379 | <term><command>groupmems</command></term>
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380 | <listitem>
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381 | <para>Allows a user to administer his/her own group membership list
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382 | without the requirement of super user privileges.</para>
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383 | <indexterm zone="ch-system-shadow groupmems">
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384 | <primary sortas="b-groupmems">groupmems</primary>
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385 | </indexterm>
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386 | </listitem>
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387 | </varlistentry>
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388 |
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389 | <varlistentry id="groupmod">
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390 | <term><command>groupmod</command></term>
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391 | <listitem>
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392 | <para>Is used to modify the given group's name or GID</para>
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393 | <indexterm zone="ch-system-shadow groupmod">
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394 | <primary sortas="b-groupmod">groupmod</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="grpck">
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400 | <term><command>grpck</command></term>
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401 | <listitem>
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402 | <para>Verifies the integrity of the group files
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403 | <filename>/etc/group</filename> and
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404 | <filename>/etc/gshadow</filename></para>
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405 | <indexterm zone="ch-system-shadow grpck">
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406 | <primary sortas="b-grpck">grpck</primary>
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407 | </indexterm>
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408 | </listitem>
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409 | </varlistentry>
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410 |
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411 | <varlistentry id="grpconv">
|
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412 | <term><command>grpconv</command></term>
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413 | <listitem>
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414 | <para>Creates or updates the shadow group file from the normal
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415 | group file</para>
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416 | <indexterm zone="ch-system-shadow grpconv">
|
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417 | <primary sortas="b-grpconv">grpconv</primary>
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418 | </indexterm>
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419 | </listitem>
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420 | </varlistentry>
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421 |
|
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422 | <varlistentry id="grpunconv">
|
---|
423 | <term><command>grpunconv</command></term>
|
---|
424 | <listitem>
|
---|
425 | <para>Updates <filename>/etc/group</filename> from
|
---|
426 | <filename>/etc/gshadow</filename> and then deletes the latter</para>
|
---|
427 | <indexterm zone="ch-system-shadow grpunconv">
|
---|
428 | <primary sortas="b-grpunconv">grpunconv</primary>
|
---|
429 | </indexterm>
|
---|
430 | </listitem>
|
---|
431 | </varlistentry>
|
---|
432 |
|
---|
433 | <varlistentry id="lastlog">
|
---|
434 | <term><command>lastlog</command></term>
|
---|
435 | <listitem>
|
---|
436 | <para>Reports the most recent login of all users or of a
|
---|
437 | given user</para>
|
---|
438 | <indexterm zone="ch-system-shadow lastlog">
|
---|
439 | <primary sortas="b-lastlog">lastlog</primary>
|
---|
440 | </indexterm>
|
---|
441 | </listitem>
|
---|
442 | </varlistentry>
|
---|
443 |
|
---|
444 | <varlistentry id="login">
|
---|
445 | <term><command>login</command></term>
|
---|
446 | <listitem>
|
---|
447 | <para>Is used by the system to let users sign on</para>
|
---|
448 | <indexterm zone="ch-system-shadow login">
|
---|
449 | <primary sortas="b-login">login</primary>
|
---|
450 | </indexterm>
|
---|
451 | </listitem>
|
---|
452 | </varlistentry>
|
---|
453 |
|
---|
454 | <varlistentry id="logoutd">
|
---|
455 | <term><command>logoutd</command></term>
|
---|
456 | <listitem>
|
---|
457 | <para>Is a daemon used to enforce restrictions on log-on time
|
---|
458 | and ports</para>
|
---|
459 | <indexterm zone="ch-system-shadow logoutd">
|
---|
460 | <primary sortas="b-logoutd">logoutd</primary>
|
---|
461 | </indexterm>
|
---|
462 | </listitem>
|
---|
463 | </varlistentry>
|
---|
464 |
|
---|
465 | <varlistentry id="newgidmap">
|
---|
466 | <term><command>newgidmap</command></term>
|
---|
467 | <listitem>
|
---|
468 | <para>Is used to set the gid mapping of a user namespace</para>
|
---|
469 | <indexterm zone="ch-system-shadow newgidmap">
|
---|
470 | <primary sortas="b-newgidmap">newgidmap</primary>
|
---|
471 | </indexterm>
|
---|
472 | </listitem>
|
---|
473 | </varlistentry>
|
---|
474 |
|
---|
475 | <varlistentry id="newgrp">
|
---|
476 | <term><command>newgrp</command></term>
|
---|
477 | <listitem>
|
---|
478 | <para>Is used to change the current GID during a login session</para>
|
---|
479 | <indexterm zone="ch-system-shadow newgrp">
|
---|
480 | <primary sortas="b-newgrp">newgrp</primary>
|
---|
481 | </indexterm>
|
---|
482 | </listitem>
|
---|
483 | </varlistentry>
|
---|
484 |
|
---|
485 | <varlistentry id="newuidmap">
|
---|
486 | <term><command>newuidmap</command></term>
|
---|
487 | <listitem>
|
---|
488 | <para>Is used to set the uid mapping of a user namespace</para>
|
---|
489 | <indexterm zone="ch-system-shadow newuidmap">
|
---|
490 | <primary sortas="b-newuidmap">newuidmap</primary>
|
---|
491 | </indexterm>
|
---|
492 | </listitem>
|
---|
493 | </varlistentry>
|
---|
494 |
|
---|
495 | <varlistentry id="newusers">
|
---|
496 | <term><command>newusers</command></term>
|
---|
497 | <listitem>
|
---|
498 | <para>Is used to create or update an entire series of user
|
---|
499 | accounts</para>
|
---|
500 | <indexterm zone="ch-system-shadow newusers">
|
---|
501 | <primary sortas="b-newusers">newusers</primary>
|
---|
502 | </indexterm>
|
---|
503 | </listitem>
|
---|
504 | </varlistentry>
|
---|
505 |
|
---|
506 | <varlistentry id="nologin">
|
---|
507 | <term><command>nologin</command></term>
|
---|
508 | <listitem>
|
---|
509 | <para>Displays a message that an account is not available; it is designed
|
---|
510 | to be used as the default shell for accounts that have been
|
---|
511 | disabled</para>
|
---|
512 | <indexterm zone="ch-system-shadow nologin">
|
---|
513 | <primary sortas="b-nologin">nologin</primary>
|
---|
514 | </indexterm>
|
---|
515 | </listitem>
|
---|
516 | </varlistentry>
|
---|
517 |
|
---|
518 | <varlistentry id="passwd">
|
---|
519 | <term><command>passwd</command></term>
|
---|
520 | <listitem>
|
---|
521 | <para>Is used to change the password for a user or group account</para>
|
---|
522 | <indexterm zone="ch-system-shadow passwd">
|
---|
523 | <primary sortas="b-passwd">passwd</primary>
|
---|
524 | </indexterm>
|
---|
525 | </listitem>
|
---|
526 | </varlistentry>
|
---|
527 |
|
---|
528 | <varlistentry id="pwck">
|
---|
529 | <term><command>pwck</command></term>
|
---|
530 | <listitem>
|
---|
531 | <para>Verifies the integrity of the password files
|
---|
532 | <filename>/etc/passwd</filename> and
|
---|
533 | <filename>/etc/shadow</filename></para>
|
---|
534 | <indexterm zone="ch-system-shadow pwck">
|
---|
535 | <primary sortas="b-pwck">pwck</primary>
|
---|
536 | </indexterm>
|
---|
537 | </listitem>
|
---|
538 | </varlistentry>
|
---|
539 |
|
---|
540 | <varlistentry id="pwconv">
|
---|
541 | <term><command>pwconv</command></term>
|
---|
542 | <listitem>
|
---|
543 | <para>Creates or updates the shadow password file from the normal
|
---|
544 | password file</para>
|
---|
545 | <indexterm zone="ch-system-shadow pwconv">
|
---|
546 | <primary sortas="b-pwconv">pwconv</primary>
|
---|
547 | </indexterm>
|
---|
548 | </listitem>
|
---|
549 | </varlistentry>
|
---|
550 |
|
---|
551 | <varlistentry id="pwunconv">
|
---|
552 | <term><command>pwunconv</command></term>
|
---|
553 | <listitem>
|
---|
554 | <para>Updates <filename>/etc/passwd</filename> from
|
---|
555 | <filename>/etc/shadow</filename> and then deletes the latter</para>
|
---|
556 | <indexterm zone="ch-system-shadow pwunconv">
|
---|
557 | <primary sortas="b-pwunconv">pwunconv</primary>
|
---|
558 | </indexterm>
|
---|
559 | </listitem>
|
---|
560 | </varlistentry>
|
---|
561 |
|
---|
562 | <varlistentry id="sg">
|
---|
563 | <term><command>sg</command></term>
|
---|
564 | <listitem>
|
---|
565 | <para>Executes a given command while the user's GID
|
---|
566 | is set to that of the given group</para>
|
---|
567 | <indexterm zone="ch-system-shadow sg">
|
---|
568 | <primary sortas="b-sg">sg</primary>
|
---|
569 | </indexterm>
|
---|
570 | </listitem>
|
---|
571 | </varlistentry>
|
---|
572 |
|
---|
573 | <varlistentry id="su">
|
---|
574 | <term><command>su</command></term>
|
---|
575 | <listitem>
|
---|
576 | <para>Runs a shell with substitute user and group IDs</para>
|
---|
577 | <indexterm zone="ch-system-shadow su">
|
---|
578 | <primary sortas="b-su">su</primary>
|
---|
579 | </indexterm>
|
---|
580 | </listitem>
|
---|
581 | </varlistentry>
|
---|
582 |
|
---|
583 | <varlistentry id="useradd">
|
---|
584 | <term><command>useradd</command></term>
|
---|
585 | <listitem>
|
---|
586 | <para>Creates a new user with the given name, or updates the default
|
---|
587 | new-user information</para>
|
---|
588 | <indexterm zone="ch-system-shadow useradd">
|
---|
589 | <primary sortas="b-useradd">useradd</primary>
|
---|
590 | </indexterm>
|
---|
591 | </listitem>
|
---|
592 | </varlistentry>
|
---|
593 |
|
---|
594 | <varlistentry id="userdel">
|
---|
595 | <term><command>userdel</command></term>
|
---|
596 | <listitem>
|
---|
597 | <para>Deletes the given user account</para>
|
---|
598 | <indexterm zone="ch-system-shadow userdel">
|
---|
599 | <primary sortas="b-userdel">userdel</primary>
|
---|
600 | </indexterm>
|
---|
601 | </listitem>
|
---|
602 | </varlistentry>
|
---|
603 |
|
---|
604 | <varlistentry id="usermod">
|
---|
605 | <term><command>usermod</command></term>
|
---|
606 | <listitem>
|
---|
607 | <para>Is used to modify the given user's login name, User
|
---|
608 | Identification (UID), shell, initial group, home directory, etc.</para>
|
---|
609 | <indexterm zone="ch-system-shadow usermod">
|
---|
610 | <primary sortas="b-usermod">usermod</primary>
|
---|
611 | </indexterm>
|
---|
612 | </listitem>
|
---|
613 | </varlistentry>
|
---|
614 |
|
---|
615 | <varlistentry id="vigr">
|
---|
616 | <term><command>vigr</command></term>
|
---|
617 | <listitem>
|
---|
618 | <para>Edits the <filename>/etc/group</filename> or
|
---|
619 | <filename>/etc/gshadow</filename> files</para>
|
---|
620 | <indexterm zone="ch-system-shadow vigr">
|
---|
621 | <primary sortas="b-vigr">vigr</primary>
|
---|
622 | </indexterm>
|
---|
623 | </listitem>
|
---|
624 | </varlistentry>
|
---|
625 |
|
---|
626 | <varlistentry id="vipw">
|
---|
627 | <term><command>vipw</command></term>
|
---|
628 | <listitem>
|
---|
629 | <para>Edits the <filename>/etc/passwd</filename> or
|
---|
630 | <filename>/etc/shadow</filename> files</para>
|
---|
631 | <indexterm zone="ch-system-shadow vipw">
|
---|
632 | <primary sortas="b-vipw">vipw</primary>
|
---|
633 | </indexterm>
|
---|
634 | </listitem>
|
---|
635 | </varlistentry>
|
---|
636 |
|
---|
637 | </variablelist>
|
---|
638 |
|
---|
639 | </sect2>
|
---|
640 |
|
---|
641 | </sect1>
|
---|