1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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3 | "http://www.oasis-open.org/docbook/xml/4.4/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 Linux_PAM-download-http "http://www.kernel.org/pub/linux/libs/pam/pre/library/Linux-PAM-&Linux_PAM-version;.tar.bz2">
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8 | <!ENTITY Linux_PAM-download-ftp "ftp://ftp.kernel.org/pub/linux/libs/pam/pre/library/Linux-PAM-&Linux_PAM-version;.tar.bz2">
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9 | <!ENTITY Linux_PAM-md5sum "34938b4f2449d4d3b2ffdbf354257205">
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10 | <!ENTITY Linux_PAM-size "364 KB">
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11 | <!ENTITY Linux_PAM-buildsize "11.4 MB">
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12 | <!ENTITY Linux_PAM-time "0.17 SBU">
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13 | ]>
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14 |
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15 | <sect1 id="Linux_PAM" xreflabel="Linux-PAM-&Linux_PAM-version;">
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16 | <sect1info>
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17 | <othername>$LastChangedBy$</othername>
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18 | <date>$Date$</date>
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19 | </sect1info>
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20 | <?dbhtml filename="linux_pam.html"?>
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21 | <title>Linux-PAM-&Linux_PAM-version;</title>
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22 | <indexterm zone="Linux_PAM">
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23 | <primary sortas="a-PAM_linux">PAM(Linux)</primary></indexterm>
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24 |
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25 | <sect2>
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26 | <title>Introduction to <application>Linux-<acronym>PAM</acronym></application>
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27 | </title>
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28 |
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29 | <para>The <application>Linux-<acronym>PAM</acronym></application> package
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30 | contains Pluggable Authentication Modules. This is useful to enable the local
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31 | system administrator to choose how applications authenticate users.</para>
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32 |
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33 | <sect3><title>Package information</title>
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34 | <itemizedlist spacing='compact'>
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35 | <listitem><para>Download (HTTP): <ulink
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36 | url="&Linux_PAM-download-http;"/></para></listitem>
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37 | <listitem><para>Download (FTP): <ulink
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38 | url="&Linux_PAM-download-ftp;"/></para></listitem>
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39 | <listitem><para>Download MD5 sum: &Linux_PAM-md5sum;</para></listitem>
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40 | <listitem><para>Download size: &Linux_PAM-size;</para></listitem>
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41 | <listitem><para>Estimated disk space required:
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42 | &Linux_PAM-buildsize;</para></listitem>
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43 | <listitem><para>Estimated build time:
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44 | &Linux_PAM-time;</para></listitem></itemizedlist>
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45 | </sect3>
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46 |
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47 | <sect3><title>Additional downloads</title>
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48 | <sect4><title>Patches</title>
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49 | <itemizedlist spacing='compact'>
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50 | <listitem><para>Required patch: <ulink
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51 | url="&patch-root;/Linux-PAM-&Linux_PAM-version;-linkage-2.patch"/></para>
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52 | </listitem></itemizedlist>
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53 | </sect4>
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54 |
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55 | <sect4><title>Documentation</title>
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56 | <itemizedlist spacing='compact'>
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57 | <listitem><para>Optional documentation: <ulink
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58 | url="http://www.kernel.org/pub/linux/libs/pam/pre/library/Linux-PAM-0.78-docs.tar.bz2"/>
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59 | </para></listitem>
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60 | </itemizedlist>
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61 | </sect4>
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62 | </sect3>
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63 |
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64 | <sect3><title><application>Linux-<acronym>PAM</acronym></application>
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65 | dependencies</title>
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66 | <sect4><title>Recommended</title>
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67 | <para><xref linkend="cracklib"/></para>
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68 | </sect4>
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69 |
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70 | <sect4><title>Optional</title>
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71 | <para><ulink
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72 | url="http://sourceforge.net/projects/sgmltools-lite/">sgmltools-lite</ulink>
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73 | and <xref linkend="db"/> (for pam_userdb module)</para>
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74 | </sect4>
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75 | </sect3>
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76 |
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77 | </sect2>
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78 |
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79 | <sect2>
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80 | <title>Installation of
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81 | <application>Linux-<acronym>PAM</acronym></application></title>
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82 |
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83 | <para>Install <application>Linux-<acronym>PAM</acronym></application> by
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84 | running the following commands:</para>
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85 |
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86 | <screen><userinput><command>patch -Np1 -i ../Linux-PAM-&Linux_PAM-version;-linkage-2.patch &&
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87 | autoconf &&
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88 | sed -i 's/(mandir)/(MANDIR)/g' modules/Simple.Rules &&
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89 | ./configure --enable-static-libpam --with-mailspool=/var/mail \
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90 | --enable-read-both-confs --sysconfdir=/etc &&
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91 | make</command></userinput></screen>
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92 |
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93 | <para>If you downloaded the documentation and wish to install it, unpack the
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94 | tarball into the <filename class='directory'>doc</filename> directory:</para>
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95 |
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96 | <screen><userinput><command>tar -jxf ../Linux-PAM-0.78-docs.tar.bz2 -C doc</command></userinput></screen>
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97 |
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98 | <para>Now, as the root user:</para>
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99 |
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100 | <screen><userinput role='root'><command>make install &&
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101 | mv -v /lib/libpam.a /lib/libpam_misc.a /lib/libpamc.a /usr/lib &&
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102 | rm -v /lib/libpam{,c,_misc}.so &&
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103 | ln -v -sf ../../lib/libpam.so.&Linux_PAM-version; /usr/lib/libpam.so &&
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104 | ln -v -sf ../../lib/libpam_misc.so.&Linux_PAM-version; /usr/lib/libpam_misc.so &&
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105 | ln -v -sf ../../lib/libpamc.so.&Linux_PAM-version; /usr/lib/libpamc.so</command></userinput></screen>
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106 |
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107 | <para>Install the documentation using the following commands:</para>
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108 |
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109 | <screen><userinput role='root'><command>install -v -d -m755 /usr/share/doc/Linux-PAM-&Linux_PAM-version; &&
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110 | for DOCTYPE in html ps specs txts
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111 | do
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112 | cp -v -R doc/$DOCTYPE /usr/share/doc/Linux-PAM-&Linux_PAM-version;
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113 | done</command></userinput></screen>
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114 |
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115 | </sect2>
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116 |
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117 | <sect2>
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118 | <title>Command explanations</title>
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119 |
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120 | <para><command>autoconf</command>: This is necessary because the patch
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121 | changes where <acronym>PAM</acronym> looks for the
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122 | <application>cracklib</application> libraries, requiring regeneration of the
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123 | configure script.</para>
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124 |
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125 | <para><command>sed -i 's/(mandir)/(MANDIR)/g'
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126 | modules/Simple.Rules</command>: This command puts the module manpages
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127 | with the rest of the manpages in
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128 | <filename>/usr/share/man</filename>.</para>
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129 |
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130 | <para><option>--enable-static-libpam</option>: This switch builds
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131 | static <acronym>PAM</acronym> libraries as well as the dynamic libraries.</para>
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132 |
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133 | <para><parameter>--with-mailspool=/var/mail</parameter>: This switch makes
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134 | the mailspool directory <acronym>FHS</acronym> compliant.</para>
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135 |
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136 | <para><option>--enable-read-both-confs</option>: This switch lets the local
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137 | administrator choose which configuration file setup to use.</para>
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138 |
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139 | <para><command>mv -v /lib/libpam.a /lib/libpam_misc.a /lib/libpamc.a
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140 | /usr/lib</command>: This command moves the static libraries to
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141 | <filename>/usr/lib</filename> to comply with <acronym>FHS</acronym>
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142 | guidelines.</para>
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143 |
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144 | <para><command>rm -v /lib/libpam{,c,_misc}.so; ln -v -sf ...
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145 | /usr/lib/...</command>: These commands move the
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146 | <filename class='symlink'>.so</filename> symlinks from
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147 | <filename class='directory'>/lib</filename> to
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148 | <filename class='directory'>/usr/lib</filename>.</para>
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149 |
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150 | </sect2>
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151 |
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152 | <sect2>
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153 | <title>Configuring
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154 | <application>Linux-<acronym>PAM</acronym></application></title>
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155 |
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156 | <sect3 id="pam-config"><title>Config files</title>
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157 | <para><filename>/etc/security/*</filename>, and
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158 | <filename>/etc/pam.d/*</filename> or <filename>/etc/pam.conf</filename></para>
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159 | <indexterm zone="Linux_PAM pam-config">
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160 | <primary sortas="e-etc-security">/etc/security/*</primary></indexterm>
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161 | <indexterm zone="Linux_PAM pam-config">
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162 | <primary sortas="e-etc-pam.d">/etc/pam.d/*</primary></indexterm>
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163 | <indexterm zone="Linux_PAM pam-config">
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164 | <primary sortas="e-etc-pam.conf">/etc/pam.conf</primary></indexterm>
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165 | </sect3>
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166 |
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167 | <sect3><title>Configuration Information</title>
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168 |
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169 | <para>Configuration information is placed in
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170 | <filename class='directory'>/etc/pam.d/</filename> or
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171 | <filename>/etc/pam.conf</filename> depending on user preference. Below are
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172 | example files of each type:</para>
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173 |
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174 | <screen># Begin /etc/pam.d/other
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175 |
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176 | auth required pam_unix.so nullok
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177 | account required pam_unix.so
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178 | session required pam_unix.so
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179 | password required pam_unix.so nullok
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180 |
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181 | # End /etc/pam.d/other
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182 |
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183 | # Begin /etc/pam.conf
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184 |
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185 | other auth required pam_unix.so nullok
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186 | other account required pam_unix.so
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187 | other session required pam_unix.so
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188 | other password required pam_unix.so nullok
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189 |
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190 | # End /etc/pam.conf</screen>
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191 |
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192 | <para>The <application><acronym>PAM</acronym></application> man page
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193 | (<command>man pam</command>) provides a good starting point for descriptions
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194 | of fields and allowable entries. The
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195 | <ulink url="http://www.kernel.org/pub/linux/libs/pam/Linux-PAM-html/pam.html">
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196 | Linux-PAM guide for system administrators</ulink>
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197 | is recommended for further reading.</para>
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198 |
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199 | <para>Refer to
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200 | <ulink url="http://www.kernel.org/pub/linux/libs/pam/modules.html"/>
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201 | for a list of various modules available.</para>
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202 |
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203 | <note><para>You should now reinstall the <xref linkend="shadow"/>
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204 | package.</para></note>
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205 | </sect3>
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206 |
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207 | </sect2>
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208 |
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209 | <sect2>
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210 | <title>Contents</title>
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211 |
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212 | <segmentedlist>
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213 | <segtitle>Installed Programs</segtitle>
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214 | <segtitle>Installed Libraries</segtitle>
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215 | <segtitle>Installed Directories</segtitle>
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216 | <seglistitem>
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217 | <seg>unix_chkpwd and pam_tally</seg>
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218 | <seg>libpam.[so,a], libpamc.[so,a] and libpam_misc.[so,a]</seg>
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219 | <seg>/etc/pam.d, /etc/security, /lib/security and /usr/include/security</seg>
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220 | </seglistitem>
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221 | </segmentedlist>
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222 |
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223 | <variablelist>
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224 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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225 | <?dbfo list-presentation="list"?>
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226 |
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227 | <varlistentry id="unix_chkpwd">
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228 | <term><command>unix_chkpwd</command></term>
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229 | <listitem><para>checks user passwords that are stored
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230 | in read protected databases.</para>
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231 | <indexterm zone="Linux_PAM unix_chkpwd">
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232 | <primary sortas="b-unix_chkpwd">unix_chkpwd</primary></indexterm>
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233 | </listitem>
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234 | </varlistentry>
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235 |
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236 | <varlistentry id="pam_tally">
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237 | <term><command>pam_tally</command></term>
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238 | <listitem><para>is used to view or manipulate the <filename>faillog</filename>
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239 | file.</para>
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240 | <indexterm zone="Linux_PAM pam_tally">
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241 | <primary sortas="b-pam_tally">pam_tally</primary></indexterm>
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242 | </listitem>
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243 | </varlistentry>
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244 |
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245 | <varlistentry id="libpam">
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246 | <term><filename class='libraryfile'>libpam.[so,a]</filename></term>
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247 | <listitem><para>provides the interfaces between applications and the
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248 | <acronym>PAM</acronym> modules.</para>
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249 | <indexterm zone="Linux_PAM libpam">
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250 | <primary sortas="c-libpam">libpam.[so,a]</primary></indexterm>
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251 | </listitem>
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252 | </varlistentry>
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253 | </variablelist>
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254 |
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255 | </sect2>
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256 |
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257 | </sect1>
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258 |
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