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 | <!ENTITY shadow-download-http "http://pkg-shadow.alioth.debian.org/releases/shadow-&shadow-version;.tar.bz2 ">
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8 | <!ENTITY shadow-download-ftp " ">
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9 | <!ENTITY shadow-md5sum "d5f7a588fadb79faeb4b08b1eee82e9a">
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10 | <!ENTITY shadow-size "2.1 MB">
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11 | <!ENTITY shadow-buildsize "35 MB">
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12 | <!ENTITY shadow-time "0.3 SBU">
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13 | ]>
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14 |
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15 | <sect1 id="shadow" xreflabel="Shadow-&shadow-version;">
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16 | <?dbhtml filename="shadow.html"?>
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17 |
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18 | <sect1info>
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19 | <othername>$LastChangedBy$</othername>
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20 | <date>$Date$</date>
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21 | </sect1info>
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22 |
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23 | <title>Shadow-&shadow-version;</title>
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24 |
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25 | <indexterm zone="shadow">
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26 | <primary sortas="a-Shadow">Shadow</primary>
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27 | </indexterm>
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28 |
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29 | <sect2 role="package">
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30 | <title>Introduction to Shadow</title>
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31 |
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32 | <para><application>Shadow</application> was indeed installed in LFS and
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33 | there is no reason to reinstall it unless you installed
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34 | <application>CrackLib</application> or
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35 | <application>Linux-PAM</application> after your LFS system was completed.
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36 | If you have installed <application>CrackLib</application> after LFS, then
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37 | reinstalling <application>Shadow</application> will enable strong password
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38 | support. If you have installed <application>Linux-PAM</application>,
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39 | reinstalling <application>Shadow</application> will allow programs such as
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40 | <command>login</command> and <command>su</command> to utilize PAM.</para>
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41 |
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42 | &lfs70_checked;
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43 |
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44 | <bridgehead renderas="sect3">Package Information</bridgehead>
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45 | <itemizedlist spacing="compact">
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46 | <listitem>
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47 | <para>Download (HTTP): <ulink url="&shadow-download-http;"/></para>
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48 | </listitem>
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49 | <!-- <listitem>
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50 | <para>Download (FTP): <ulink url="&shadow-download-ftp;"/></para>
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51 | </listitem> -->
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52 | <listitem>
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53 | <para>Download MD5 sum: &shadow-md5sum;</para>
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54 | </listitem>
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55 | <listitem>
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56 | <para>Download size: &shadow-size;</para>
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57 | </listitem>
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58 | <listitem>
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59 | <para>Estimated disk space required: &shadow-buildsize;</para>
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60 | </listitem>
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61 | <listitem>
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62 | <para>Estimated build time: &shadow-time;</para>
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63 | </listitem>
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64 | </itemizedlist>
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65 |
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66 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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67 | <itemizedlist spacing='compact'>
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68 | <listitem>
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69 | <para>Required patch: <ulink
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70 | url="http://www.&lfs-domainname;/patches/lfs/development/shadow-&shadow-version;-nscd-1.patch"/>
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71 | </para>
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72 | </listitem>
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73 | </itemizedlist>
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74 |
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75 | <bridgehead renderas="sect3">Shadow Dependencies</bridgehead>
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76 |
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77 | <bridgehead renderas="sect4">Required</bridgehead>
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78 | <para role="required"><xref linkend="linux-pam"/> or
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79 | <xref linkend="cracklib"/></para>
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80 |
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81 | <para condition="html" role="usernotes">User Notes:
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82 | <ulink url="&blfs-wiki;/shadow"/></para>
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83 |
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84 | </sect2>
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85 |
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86 | <sect2 role="installation">
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87 | <title>Installation of Shadow</title>
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88 |
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89 | <important>
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90 | <para>The installation commands shown below are for installations where
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91 | <application>Linux-PAM</application> has been installed (with or
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92 | without a <application>CrackLib</application> installation) and
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93 | <application>Shadow</application> is being reinstalled to support the
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94 | <application>Linux-PAM</application> installation.</para>
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95 |
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96 | <para> If you are reinstalling <application>Shadow</application> to
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97 | provide strong password support using the
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98 | <application>CrackLib</application> library without using
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99 | <application>Linux-PAM</application>, ensure you add the
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100 | <parameter>--with-libcrack</parameter> parameter to the
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101 | <command>configure</command> script below and also issue the following
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102 | command:</para>
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103 |
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104 | <screen><userinput>sed -i 's@DICTPATH.*@DICTPATH\t/lib/cracklib/pw_dict@' etc/login.defs</userinput></screen>
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105 | </important>
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106 |
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107 | <para>Reinstall <application>Shadow</application> by running the following
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108 | commands:</para>
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109 |
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110 | <screen><userinput>sed -i 's/groups$(EXEEXT) //' src/Makefile.in &&
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111 | find man -name Makefile.in -exec sed -i 's/groups\.1 / /' {} \; &&
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112 | sed -i -e 's/ ko//' -e 's/ zh_CN zh_TW//' man/Makefile.in &&
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113 |
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114 | sed -i -e 's@#ENCRYPT_METHOD DES@ENCRYPT_METHOD SHA512@' \
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115 | -e 's@/var/spool/mail@/var/mail@' etc/login.defs &&
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116 |
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117 | sed -i -e 's@PATH=/sbin:/bin:/usr/sbin:/usr/bin@&:/usr/local/sbin:/usr/local/bin@' \
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118 | -e 's@PATH=/bin:/usr/bin@&:/usr/local/bin@' etc/login.defs &&
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119 |
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120 | patch -Np1 -i ../shadow-&shadow-version;-nscd-1.patch &&
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121 |
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122 | ./configure --prefix=/usr --sysconfdir=/etc \
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123 | --without-acl --without-attr &&
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124 | make</userinput></screen>
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125 |
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126 | <para>This package does not come with a test suite.</para>
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127 |
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128 | <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
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129 |
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130 | <screen role="root"><userinput>make install &&
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131 | mv -v /usr/bin/passwd /bin</userinput></screen>
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132 |
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133 | </sect2>
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134 |
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135 | <sect2 role="commands">
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136 | <title>Command Explanations</title>
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137 |
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138 | <para><command>sed -i 's/groups$(EXEEXT) //' src/Makefile.in</command>:
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139 | This command is used to suppress the installation of the
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140 | <command>groups</command> program as the version from the
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141 | <application>Coreutils</application> package installed during LFS is
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142 | preferred.</para>
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143 |
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144 | <para><command>find man -name Makefile.in -exec ... {} \;</command>: This
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145 | command is used to suppress the installation of the
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146 | <command>groups</command> man pages so the existing ones installed from
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147 | the <application>Coreutils</application> package are not replaced.</para>
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148 |
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149 | <para><command>sed -i -e '...' -e '...' man/Makefile.in</command>: This
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150 | command disables the installation of Chinese and Korean manual pages, since
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151 | <application>Man-DB</application> cannot format them properly.</para>
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152 |
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153 | <para><command>sed -i -e 's@#ENCRYPT_METHOD DES@ENCRYPT_METHOD SHA512@'
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154 | -e 's@/var/spool/mail@/var/mail@' etc/login.defs</command>:
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155 | Instead of using the default 'DES' method, this command modifies the
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156 | installation to use the more secure 'SHA512' method of hashing passwords,
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157 | which also allows passwords longer than eight characters. It also changes
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158 | the obsolete <filename class="directory">/var/spool/mail</filename>
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159 | location for user mailboxes that <application>Shadow</application> uses by
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160 | default to the <filename class="directory">/var/mail</filename>
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161 | location.</para>
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162 |
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163 | <para><command>sed -i -e
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164 | 's@PATH=/sbin:/bin:/usr/sbin:/usr/bin@&:/usr/local/sbin:/usr/local/bin@'
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165 | -e 's@PATH=/bin:/usr/bin@&:/usr/local/bin@' etc/login.defs</command>:
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166 | This sed expands PATH to <filename class="directory">/usr/local/bin</filename>
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167 | for normal and <systemitem class="username">root</systemitem> user and to
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168 | <filename class="directory">/usr/local/sbin</filename> for
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169 | <systemitem class="username">root</systemitem> user only.</para>
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170 |
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171 | <para><command>--without-acl</command>: Disables linking with <xref linkend="acl"/>
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172 | since <application>Shadow</application> fails to compile if it is present.</para>
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173 |
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174 | <para><command>--without-attr</command>: Disables linking with <xref linkend="attr"/>
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175 | since <application>Shadow</application> fails to compile if it is present.</para>
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176 |
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177 | <para><command>mv -v /usr/bin/passwd /bin</command>: The
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178 | <command>passwd</command> program may be needed during times when the
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179 | <filename class='directory'>/usr</filename> filesystem is not mounted so
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180 | it is moved into the root partition.</para>
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181 |
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182 | </sect2>
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183 |
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184 | <sect2 role="configuration">
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185 | <title>Configuring Shadow</title>
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186 |
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187 | <para><application>Shadow</application>'s stock configuration for the
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188 | <command>useradd</command> utility may not be desirable for your
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189 | installation. One default parameter causes <command>useradd</command> to
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190 | create a mailbox file for any newly created user.
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191 | <command>useradd</command> will make the group ownership of this file to
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192 | the <systemitem class="groupname">mail</systemitem> group with 0660
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193 | permissions. If you would prefer that these mailbox files are not created
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194 | by <command>useradd</command>, issue the
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195 | following command as the <systemitem class="username">root</systemitem> user:</para>
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196 |
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197 | <screen role="root"><userinput>sed -i 's/yes/no/' /etc/default/useradd</userinput></screen>
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198 |
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199 | </sect2>
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200 |
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201 | <sect2 role="configuration">
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202 | <title>Configuring Linux-PAM to Work with Shadow</title>
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203 |
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204 | <note>
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205 | <para>The rest of this page is devoted to configuring
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206 | <application>Shadow</application> to work properly with
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207 | <application>Linux-PAM</application>. If you do not have
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208 | <application>Linux-PAM</application> installed, and you reinstalled
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209 | <application>Shadow</application> to support strong passwords via
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210 | the <application>CrackLib</application> library, no further configuration
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211 | is required.</para>
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212 | </note>
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213 |
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214 | <sect3 id="pam.d">
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215 | <title>Config Files</title>
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216 |
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217 | <para><filename>/etc/pam.d/*</filename> or alternatively
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218 | <filename>/etc/pam.conf, /etc/login.defs, and
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219 | /etc/security/*</filename></para>
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220 |
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221 | <indexterm zone="shadow pam.d">
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222 | <primary sortas="e-etc-pam.d">/etc/pam.d/*</primary>
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223 | </indexterm>
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224 |
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225 | <indexterm zone="shadow pam.d">
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226 | <primary sortas="e-etc-pam.conf">/etc/pam.conf</primary>
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227 | </indexterm>
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228 |
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229 | <indexterm zone="shadow pam.d">
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230 | <primary sortas="e-etc-login.defs">/etc/login.defs</primary>
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231 | </indexterm>
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232 |
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233 | <indexterm zone="shadow pam.d">
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234 | <primary sortas="e-etc-security">/etc/security/*</primary>
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235 | </indexterm>
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236 |
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237 | </sect3>
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238 |
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239 | <sect3>
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240 | <title>Configuration Information</title>
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241 |
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242 | <para>Configuring your system to use <application>Linux-PAM</application>
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243 | can be a complex task. The information below will provide a basic setup
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244 | so that <application>Shadow</application>'s login and password
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245 | functionality will work effectively with
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246 | <application>Linux-PAM</application>. Review the information and links on
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247 | the <xref linkend="linux-pam"/> page for further configuration
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248 | information. For information specific to integrating
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249 | <application>Shadow</application>, <application>Linux-PAM</application>
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250 | and <application>CrackLib</application>, you can visit the following
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251 | link:</para>
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252 |
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253 | <itemizedlist spacing="compact">
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254 | <listitem>
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255 | <para><ulink
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256 | url="http://www.deer-run.com/~hal/sysadmin/pam_cracklib.html"/></para>
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257 | </listitem>
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258 | </itemizedlist>
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259 |
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260 | <sect4 id="pam-login-defs">
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261 | <title>Configuring /etc/login.defs</title>
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262 |
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263 | <para>The <command>login</command> program currently performs many
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264 | functions which <application>Linux-PAM</application> modules should
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265 | now handle. The following <command>sed</command> command will comment
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266 | out the appropriate lines in <filename>/etc/login.defs</filename>, and
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267 | stop <command>login</command> from performing these functions (a backup
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268 | file named <filename>/etc/login.defs.orig</filename> is also created
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269 | to preserve the original file's contents). Issue the following commands
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270 | as the <systemitem class="username">root</systemitem> user:</para>
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271 |
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272 | <indexterm zone="shadow pam-login-defs">
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273 | <primary sortas="e-etc-login.defs">/etc/login.defs</primary>
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274 | </indexterm>
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275 |
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276 | <screen role="root"><userinput>install -v -m644 /etc/login.defs /etc/login.defs.orig &&
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277 | for FUNCTION in FAIL_DELAY LASTLOG_ENAB \
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278 | MAIL_CHECK_ENAB \
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279 | OBSCURE_CHECKS_ENAB \
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280 | PORTTIME_CHECKS_ENAB \
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281 | CONSOLE MOTD_FILE \
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282 | NOLOGINS_FILE ENV_HZ \
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283 | SU_WHEEL_ONLY \
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284 | CRACKLIB_DICTPATH \
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285 | SYS_UID_MIN SYS_UID_MAX \
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286 | SYS_GID_MIN SYS_GID_MAX \
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287 | PASS_CHANGE_TRIES \
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288 | PASS_ALWAYS_WARN \
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289 | CHFN_AUTH ENVIRON_FILE
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290 | do
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291 | sed -i "s/^$FUNCTION/# &/" /etc/login.defs
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292 | done</userinput></screen>
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293 |
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294 | </sect4>
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295 |
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296 | <sect4>
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297 | <title>Configuring the /etc/pam.d/ Files</title>
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298 |
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299 | <para>As mentioned previously in the
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300 | <application>Linux-PAM</application> instructions,
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301 | <application>Linux-PAM</application> has two supported methods for
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302 | configuration. The commands below assume that you've chosen to use
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303 | a directory based configuration, where each program has its own
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304 | configuration file. You can optionally use a single
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305 | <filename>/etc/pam.conf</filename> configuration file by using the
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306 | text from the files below, and supplying the program name as an
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307 | additional first field for each line.</para>
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308 |
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309 | <para>As the <systemitem class="username">root</systemitem> user,
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310 | replace the following <application>Linux-PAM</application>
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311 | configuration files in the
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312 | <filename class="directory">/etc/pam.d/</filename> directory (or
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313 | add the contents to the <filename>/etc/pam.conf</filename> file) using
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314 | the following commands:</para>
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315 |
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316 | </sect4>
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317 |
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318 | <sect4>
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319 | <title>'system-account'</title>
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320 |
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321 | <screen role="root"><userinput>cat > /etc/pam.d/system-account << "EOF"
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322 | <literal># Begin /etc/pam.d/system-account
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323 |
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324 | account required pam_unix.so
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325 |
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326 | # End /etc/pam.d/system-account</literal>
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327 | EOF</userinput></screen>
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328 |
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329 | </sect4>
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330 |
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331 | <sect4>
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332 | <title>'system-auth'</title>
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333 |
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334 | <screen role="root"><userinput>cat > /etc/pam.d/system-auth << "EOF"
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335 | <literal># Begin /etc/pam.d/system-auth
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336 |
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337 | auth required pam_unix.so
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338 |
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339 | # End /etc/pam.d/system-auth</literal>
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340 | EOF</userinput></screen>
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341 |
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342 | </sect4>
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343 |
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344 | <sect4>
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345 | <title>'system-passwd' (with cracklib)</title>
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346 |
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347 | <screen role="root"><userinput>cat > /etc/pam.d/system-password << "EOF"
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348 | <literal># Begin /etc/pam.d/system-password
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349 |
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350 | # check new passwords for strength (man pam_cracklib)
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351 | password required pam_cracklib.so type=Linux retry=3 difok=5 \
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352 | difignore=23 minlen=9 dcredit=1 \
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353 | ucredit=1 lcredit=1 ocredit=1 \
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354 | dictpath=/lib/cracklib/pw_dict
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355 | # use sha512 hash for encryption, use shadow, and use the
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356 | # authentication token (chosen password) set by pam_cracklib
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357 | # above (or any previous modules)
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358 | password required pam_unix.so sha512 shadow use_authtok
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359 |
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360 | # End /etc/pam.d/system-password</literal>
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361 | EOF</userinput></screen>
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362 |
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363 | <note><para>In its default configuration, owing to credits,
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364 | pam_cracklib will allow multiple case passwords as short as 6
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365 | characters, even with the <parameter>minlen</parameter> value
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366 | set to 11. You should review the pam_cracklib(8) man page and
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367 | determine if these default values are acceptable for the security
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368 | of your system.</para></note>
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369 |
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370 | </sect4>
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371 |
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372 | <sect4>
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373 | <title>'system-passwd' (without cracklib)</title>
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374 |
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375 | <screen role="root"><userinput>cat > /etc/pam.d/system-password << "EOF"
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376 | <literal># Begin /etc/pam.d/system-password
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377 |
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378 | # use sha512 hash for encryption, use shadow, and try to use any previously
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379 | # defined authentication token (chosen password) set by any prior module
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380 | password required pam_unix.so sha512 shadow try_first_pass
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381 |
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382 | # End /etc/pam.d/system-password</literal>
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383 | EOF</userinput></screen>
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384 |
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385 | </sect4>
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386 |
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387 | <sect4>
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388 | <title>'system-session'</title>
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389 |
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390 | <screen role="root"><userinput>cat > /etc/pam.d/system-session << "EOF"
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391 | <literal># Begin /etc/pam.d/system-session
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392 |
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393 | session required pam_unix.so
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394 |
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395 | # End /etc/pam.d/system-session</literal>
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396 | EOF</userinput></screen>
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397 |
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398 | </sect4>
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399 |
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400 | <sect4>
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401 | <title>'login'</title>
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402 |
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403 | <screen role="root"><userinput>cat > /etc/pam.d/login << "EOF"
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404 | <literal># Begin /etc/pam.d/login
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405 |
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406 | # Set failure delay before next prompt to 3 seconds
|
---|
407 | auth optional pam_faildelay.so delay=3000000
|
---|
408 |
|
---|
409 | # Check to make sure that the user is allowed to login
|
---|
410 | auth requisite pam_nologin.so
|
---|
411 |
|
---|
412 | # Check to make sure that root is allowed to login
|
---|
413 | # Disabled by default. You will need to create /etc/securetty
|
---|
414 | # file for this module to function. See man 5 securetty.
|
---|
415 | #auth required pam_securetty.so
|
---|
416 |
|
---|
417 | # Additional group memberships - disabled by default
|
---|
418 | #auth optional pam_group.so
|
---|
419 |
|
---|
420 | # include the default auth settings
|
---|
421 | auth include system-auth
|
---|
422 |
|
---|
423 | # check access for the user
|
---|
424 | account required pam_access.so
|
---|
425 |
|
---|
426 | # include the default account settings
|
---|
427 | account include system-account
|
---|
428 |
|
---|
429 | # Set default environment variables for the user
|
---|
430 | session required pam_env.so
|
---|
431 |
|
---|
432 | # Set resource limits for the user
|
---|
433 | session required pam_limits.so
|
---|
434 |
|
---|
435 | # Display date of last login - Disabled by default
|
---|
436 | #session optional pam_lastlog.so
|
---|
437 |
|
---|
438 | # Display the message of the day - Disabled by default
|
---|
439 | #session optional pam_motd.so
|
---|
440 |
|
---|
441 | # Check user's mail - Disabled by default
|
---|
442 | #session optional pam_mail.so standard quiet
|
---|
443 |
|
---|
444 | # include the default session and password settings
|
---|
445 | session include system-session
|
---|
446 | password include system-password
|
---|
447 |
|
---|
448 | # End /etc/pam.d/login</literal>
|
---|
449 | EOF</userinput></screen>
|
---|
450 |
|
---|
451 | </sect4>
|
---|
452 |
|
---|
453 | <sect4>
|
---|
454 | <title>'passwd'</title>
|
---|
455 |
|
---|
456 | <screen role="root"><userinput>cat > /etc/pam.d/passwd << "EOF"
|
---|
457 | <literal># Begin /etc/pam.d/passwd
|
---|
458 |
|
---|
459 | password include system-password
|
---|
460 |
|
---|
461 | # End /etc/pam.d/passwd</literal>
|
---|
462 | EOF</userinput></screen>
|
---|
463 |
|
---|
464 | </sect4>
|
---|
465 |
|
---|
466 | <sect4>
|
---|
467 | <title>'su'</title>
|
---|
468 |
|
---|
469 | <screen role="root"><userinput>cat > /etc/pam.d/su << "EOF"
|
---|
470 | <literal># Begin /etc/pam.d/su
|
---|
471 |
|
---|
472 | # always allow root
|
---|
473 | auth sufficient pam_rootok.so
|
---|
474 | auth include system-auth
|
---|
475 |
|
---|
476 | # include the default account settings
|
---|
477 | account include system-account
|
---|
478 |
|
---|
479 | # Set default environment variables for the service user
|
---|
480 | session required pam_env.so
|
---|
481 |
|
---|
482 | # include system session defaults
|
---|
483 | session include system-session
|
---|
484 |
|
---|
485 | # End /etc/pam.d/su</literal>
|
---|
486 | EOF</userinput></screen>
|
---|
487 |
|
---|
488 | </sect4>
|
---|
489 |
|
---|
490 | <sect4>
|
---|
491 | <title>'chage'</title>
|
---|
492 |
|
---|
493 | <screen role="root"><userinput>cat > /etc/pam.d/chage << "EOF"
|
---|
494 | <literal>#Begin /etc/pam.d/chage
|
---|
495 |
|
---|
496 | # always allow root
|
---|
497 | auth sufficient pam_rootok.so
|
---|
498 |
|
---|
499 | # include system defaults for auth account and session
|
---|
500 | auth include system-auth
|
---|
501 | account include system-account
|
---|
502 | session include system-session
|
---|
503 |
|
---|
504 | # Always permit for authentication updates
|
---|
505 | password required pam_permit.so
|
---|
506 |
|
---|
507 | # End /etc/pam.d/chage</literal>
|
---|
508 | EOF</userinput></screen>
|
---|
509 |
|
---|
510 | </sect4>
|
---|
511 |
|
---|
512 | <sect4>
|
---|
513 | <title>'chfn', 'chgpasswd', 'chgpasswd', 'chsh', 'groupadd',
|
---|
514 | 'groupdel', 'groupmems', 'groupmod', 'newusers', 'useradd', 'userdel'
|
---|
515 | and 'usermod'</title>
|
---|
516 |
|
---|
517 | <screen role="root"><userinput>for PROGRAM in chfn chgpasswd chpasswd chsh groupadd groupdel \
|
---|
518 | groupmems groupmod newusers useradd userdel usermod
|
---|
519 | do
|
---|
520 | install -v -m644 /etc/pam.d/chage /etc/pam.d/$PROGRAM
|
---|
521 | sed -i "s/chage/$PROGRAM/" /etc/pam.d/$PROGRAM
|
---|
522 | done</userinput></screen>
|
---|
523 |
|
---|
524 | <warning>
|
---|
525 | <para>At this point, you should do a simple test to see if
|
---|
526 | <application>Shadow</application> is working as expected. Open
|
---|
527 | another terminal and log in as a user, then <command>su</command> to
|
---|
528 | <systemitem class="username">root</systemitem>. If you do not see any
|
---|
529 | errors, then all is well and you should proceed with the rest of the
|
---|
530 | configuration. If you did receive errors, stop now and double check
|
---|
531 | the above configuration files manually. You can also run the test
|
---|
532 | suite from the <application>Linux-PAM</application> package to assist
|
---|
533 | you in determining the problem. If you cannot find and
|
---|
534 | fix the error, you should recompile <application>Shadow</application>
|
---|
535 | adding the <option>--without-libpam</option> switch to the
|
---|
536 | <command>configure</command> command in the above instructions
|
---|
537 | (also move the <filename>/etc/login.defs.orig</filename> backup
|
---|
538 | file to <filename>/etc/login.defs</filename>). If you
|
---|
539 | fail to do this and the errors remain, you will be unable to log into
|
---|
540 | your system.</para>
|
---|
541 | </warning>
|
---|
542 |
|
---|
543 | </sect4>
|
---|
544 |
|
---|
545 | <sect4>
|
---|
546 | <title>Other</title>
|
---|
547 |
|
---|
548 | <para>Currently, <filename>/etc/pam.d/other</filename> is configured
|
---|
549 | to allow anyone with an account on the machine to use PAM-aware
|
---|
550 | programs without a configuration file for that program. After testing
|
---|
551 | <application>Linux-PAM</application> for proper configuration, install
|
---|
552 | a more restrictive <filename>other</filename> file so that
|
---|
553 | program-specific configuration files are required:</para>
|
---|
554 |
|
---|
555 | <screen role="root"><userinput>cat > /etc/pam.d/other << "EOF"
|
---|
556 | <literal># Begin /etc/pam.d/other
|
---|
557 |
|
---|
558 | auth required pam_warn.so
|
---|
559 | auth required pam_deny.so
|
---|
560 | account required pam_warn.so
|
---|
561 | account required pam_deny.so
|
---|
562 | password required pam_warn.so
|
---|
563 | password required pam_deny.so
|
---|
564 | session required pam_warn.so
|
---|
565 | session required pam_deny.so
|
---|
566 |
|
---|
567 | # End /etc/pam.d/other</literal>
|
---|
568 | EOF</userinput></screen>
|
---|
569 |
|
---|
570 | </sect4>
|
---|
571 |
|
---|
572 | <sect4 id="pam-access">
|
---|
573 | <title>Configuring Login Access</title>
|
---|
574 |
|
---|
575 | <para>Instead of using the <filename>/etc/login.access</filename>
|
---|
576 | file for controlling access to the system,
|
---|
577 | <application>Linux-PAM</application> uses the
|
---|
578 | <filename class='libraryfile'>pam_access.so</filename> module along
|
---|
579 | with the <filename>/etc/security/access.conf</filename> file. Rename
|
---|
580 | the <filename>/etc/login.access</filename> file using the following
|
---|
581 | command:</para>
|
---|
582 |
|
---|
583 | <indexterm zone="shadow pam-access">
|
---|
584 | <primary sortas="e-etc-security-access.conf">/etc/security/access.conf</primary>
|
---|
585 | </indexterm>
|
---|
586 |
|
---|
587 | <screen role="root"><userinput>if [ -f /etc/login.access ]; then
|
---|
588 | mv -v /etc/login.access /etc/login.access.NOUSE
|
---|
589 | fi</userinput></screen>
|
---|
590 |
|
---|
591 | </sect4>
|
---|
592 |
|
---|
593 | <sect4 id="pam-limits">
|
---|
594 | <title>Configuring Resource Limits</title>
|
---|
595 |
|
---|
596 | <para>Instead of using the <filename>/etc/limits</filename> file
|
---|
597 | for limiting usage of system resources,
|
---|
598 | <application>Linux-PAM</application> uses the
|
---|
599 | <filename class='libraryfile'>pam_limits.so</filename> module along
|
---|
600 | with the <filename>/etc/security/limits.conf</filename> file. Rename
|
---|
601 | the <filename>/etc/limits</filename> file using the following
|
---|
602 | command:</para>
|
---|
603 |
|
---|
604 | <indexterm zone="shadow pam-limits">
|
---|
605 | <primary sortas="e-etc-security-limits.conf">/etc/security/limits.conf</primary>
|
---|
606 | </indexterm>
|
---|
607 |
|
---|
608 | <screen role="root"><userinput>if [ -f /etc/limits ]; then
|
---|
609 | mv -v /etc/limits /etc/limits.NOUSE
|
---|
610 | fi</userinput></screen>
|
---|
611 |
|
---|
612 | </sect4>
|
---|
613 |
|
---|
614 | </sect3>
|
---|
615 |
|
---|
616 | </sect2>
|
---|
617 |
|
---|
618 | <sect2 role="content">
|
---|
619 | <title>Contents</title>
|
---|
620 |
|
---|
621 | <para>A list of the installed files, along with their short descriptions
|
---|
622 | can be found at
|
---|
623 | <ulink url="&lfs-root;/chapter06/shadow.html#contents-shadow"/>.</para>
|
---|
624 |
|
---|
625 | </sect2>
|
---|
626 |
|
---|
627 | </sect1>
|
---|