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 "ccff87fe639efdfc22b1ba4a0f08ec57">
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10 | <!ENTITY Linux_PAM-size "376 KB">
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11 | <!ENTITY Linux_PAM-buildsize "8.6 MB">
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12 | <!ENTITY Linux_PAM-time "0.2 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 | <?dbhtml filename="linux_pam.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>Linux-PAM-&Linux_PAM-version;</title>
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24 |
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25 | <indexterm zone="Linux_PAM">
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26 | <primary sortas="a-PAM_linux">PAM(Linux)</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 Linux-PAM</title>
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31 |
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32 | <para>The <application>Linux-PAM</application> package contains
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33 | Pluggable Authentication Modules. This is useful to enable the
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34 | local system administrator to choose how applications authenticate
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35 | users.</para>
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36 |
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37 | <bridgehead renderas="sect3">Package Information</bridgehead>
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38 | <itemizedlist spacing="compact">
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39 | <listitem>
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40 | <para>Download (HTTP): <ulink url="&Linux_PAM-download-http;"/></para>
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41 | </listitem>
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42 | <listitem>
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43 | <para>Download (FTP): <ulink url="&Linux_PAM-download-ftp;"/></para>
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44 | </listitem>
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45 | <listitem>
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46 | <para>Download MD5 sum: &Linux_PAM-md5sum;</para>
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47 | </listitem>
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48 | <listitem>
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49 | <para>Download size: &Linux_PAM-size;</para>
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50 | </listitem>
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51 | <listitem>
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52 | <para>Estimated disk space required: &Linux_PAM-buildsize;</para>
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53 | </listitem>
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54 | <listitem>
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55 | <para>Estimated build time: &Linux_PAM-time;</para>
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56 | </listitem>
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57 | </itemizedlist>
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58 |
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59 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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60 | <itemizedlist spacing='compact'>
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61 | <title>Documentation</title>
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62 | <listitem>
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63 | <para>Optional documentation: <ulink
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64 | url="http://www.kernel.org/pub/linux/libs/pam/pre/library/Linux-PAM-&Linux_PAM-version;-docs.tar.bz2"/>
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65 | </para>
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66 | </listitem>
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67 | </itemizedlist>
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68 |
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69 | <bridgehead renderas="sect3">Linux-PAM Dependencies</bridgehead>
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70 |
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71 | <bridgehead renderas="sect4">Recommended</bridgehead>
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72 | <para><xref linkend="cracklib"/></para>
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73 |
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74 | <bridgehead renderas="sect4">Optional</bridgehead>
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75 | <para><ulink
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76 | url="http://sourceforge.net/projects/sgmltools-lite/">sgmltools-lite</ulink>
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77 | and <xref linkend="db"/> (for pam_userdb module)</para>
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78 |
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79 | </sect2>
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80 |
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81 | <sect2 role="installation">
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82 | <title>Installation of Linux-PAM</title>
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83 |
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84 | <para>Install <application>Linux-PAM</application> by
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85 | running the following commands:</para>
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86 |
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87 | <screen><userinput>sed -i 's|DICT_DIR_CANDIDATES="|&/lib /lib/cracklib |' \
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88 | configure &&
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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 | --mandir=/usr/share/man &&
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92 | make</userinput></screen>
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93 |
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94 | <para>If you downloaded the documentation and wish to install it, unpack the
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95 | tarball into the <filename class='directory'>doc</filename> directory:</para>
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96 |
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97 | <screen><userinput>tar -jxf ../Linux-PAM-&Linux_PAM-version;-docs.tar.bz2 -C doc</userinput></screen>
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98 |
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99 | <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
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100 |
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101 | <screen role="root"><userinput>make install &&
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102 | mv -v /lib/libpam.a /lib/libpam_misc.a /lib/libpamc.a /usr/lib &&
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103 | rm -v /lib/libpam{,c,_misc}.so &&
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104 | ln -v -sf ../../lib/libpam.so.&Linux_PAM-version; /usr/lib/libpam.so &&
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105 | ln -v -sf ../../lib/libpam_misc.so.&Linux_PAM-version; /usr/lib/libpam_misc.so &&
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106 | ln -v -sf ../../lib/libpamc.so.&Linux_PAM-version; /usr/lib/libpamc.so</userinput></screen>
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107 |
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108 | <para>Install the documentation using the following commands:</para>
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109 |
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110 | <screen role="root"><userinput>install -v -d -m755 /usr/share/doc/Linux-PAM-&Linux_PAM-version; &&
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111 | for DOCTYPE in html ps specs txts
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112 | do
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113 | cp -v -R doc/$DOCTYPE /usr/share/doc/Linux-PAM-&Linux_PAM-version;
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114 | done</userinput></screen>
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115 |
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116 | </sect2>
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117 |
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118 | <sect2 role="commands">
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119 | <title>Command Explanations</title>
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120 |
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121 | <para><command>sed -i 's|DICT_DIR_CANDIDATES="|&/lib /lib/cracklib |'
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122 | configure</command>: This command changes where
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123 | <command>configure</command> looks to find the
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124 | <application>CrackLib</application> dictionary.</para>
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125 |
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126 | <para><parameter>--enable-static-libpam</parameter>: This switch builds
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127 | static PAM libraries as well as the dynamic libraries.</para>
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128 |
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129 | <para><parameter>--with-mailspool=/var/mail</parameter>: This switch
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130 | makes the mailspool directory FHS compliant.</para>
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131 |
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132 | <para><parameter>--enable-read-both-confs</parameter>: This switch lets
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133 | the local administrator choose which configuration file setup to use.</para>
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134 |
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135 | <para><command>mv -v /lib/libpam.a /lib/libpam_misc.a /lib/libpamc.a
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136 | /usr/lib</command>: This command moves the static libraries to
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137 | <filename class='directory'>/usr/lib</filename> to comply with FHS
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138 | guidelines.</para>
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139 |
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140 | <para><command>rm -v /lib/libpam{,c,_misc}.so; ln -v -sf ...
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141 | /usr/lib/...</command>: These commands move the
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142 | <filename class='symlink'>.so</filename> symlinks from
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143 | <filename class='directory'>/lib</filename> to
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144 | <filename class='directory'>/usr/lib</filename>.</para>
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145 |
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146 | </sect2>
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147 |
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148 | <sect2 role="configuration">
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149 | <title>Configuring Linux-PAM</title>
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150 |
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151 | <sect3 id="pam-config">
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152 | <title>Config Files</title>
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153 |
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154 | <para><filename>/etc/security/*</filename> and
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155 | <filename>/etc/pam.d/*</filename> or
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156 | <filename>/etc/pam.conf</filename></para>
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157 |
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158 | <indexterm zone="Linux_PAM pam-config">
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159 | <primary sortas="e-etc-security">/etc/security/*</primary>
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160 | </indexterm>
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161 |
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162 | <indexterm zone="Linux_PAM pam-config">
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163 | <primary sortas="e-etc-pam.d">/etc/pam.d/*</primary>
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164 | </indexterm>
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165 |
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166 | <indexterm zone="Linux_PAM pam-config">
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167 | <primary sortas="e-etc-pam.conf">/etc/pam.conf</primary>
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168 | </indexterm>
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169 |
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170 | </sect3>
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171 |
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172 | <sect3>
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173 | <title>Configuration Information</title>
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174 |
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175 | <para>Configuration information is placed in
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176 | <filename class='directory'>/etc/pam.d/</filename> or
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177 | <filename>/etc/pam.conf</filename> depending on user preference.
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178 | Below are example files of each type:</para>
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179 |
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180 | <screen><literal># Begin /etc/pam.d/other
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181 |
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182 | auth required pam_unix.so nullok
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183 | account required pam_unix.so
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184 | session required pam_unix.so
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185 | password required pam_unix.so nullok
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186 |
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187 | # End /etc/pam.d/other
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188 |
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189 | # Begin /etc/pam.conf
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190 |
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191 | other auth required pam_unix.so nullok
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192 | other account required pam_unix.so
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193 | other session required pam_unix.so
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194 | other password required pam_unix.so nullok
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195 |
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196 | # End /etc/pam.conf</literal></screen>
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197 |
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198 | <para>The <application>PAM</application> man page
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199 | (<command>man pam</command>) provides a good starting point for
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200 | descriptions of fields and allowable entries. The <ulink
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201 | url="http://www.kernel.org/pub/linux/libs/pam/Linux-PAM-html/pam.html">
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202 | Linux-PAM guide for system administrators</ulink>
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203 | is recommended for further reading.</para>
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204 |
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205 | <para>Refer to <ulink
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206 | url="http://www.kernel.org/pub/linux/libs/pam/modules.html"/>
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207 | for a list of various modules available.</para>
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208 |
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209 | <note>
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210 | <para>You should now reinstall the <xref linkend="shadow"/>
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211 | package.</para>
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212 | </note>
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213 |
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214 | </sect3>
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215 |
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216 | </sect2>
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217 |
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218 | <sect2 role="content">
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219 | <title>Contents</title>
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220 |
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221 | <segmentedlist>
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222 | <segtitle>Installed Programs</segtitle>
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223 | <segtitle>Installed Libraries</segtitle>
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224 | <segtitle>Installed Directories</segtitle>
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225 |
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226 | <seglistitem>
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227 | <seg>unix_chkpwd and pam_tally</seg>
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228 | <seg>libpam.[so,a], libpamc.[so,a], and libpam_misc.[so,a]</seg>
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229 | <seg>/etc/pam.d, /etc/security, /lib/security, and
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230 | /usr/include/security</seg>
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231 | </seglistitem>
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232 | </segmentedlist>
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233 |
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234 | <variablelist>
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235 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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236 | <?dbfo list-presentation="list"?>
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237 | <?dbhtml list-presentation="table"?>
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238 |
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239 | <varlistentry id="unix_chkpwd">
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240 | <term><command>unix_chkpwd</command></term>
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241 | <listitem>
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242 | <para>checks user passwords that are stored
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243 | in read protected databases.</para>
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244 | <indexterm zone="Linux_PAM unix_chkpwd">
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245 | <primary sortas="b-unix_chkpwd">unix_chkpwd</primary>
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246 | </indexterm>
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247 | </listitem>
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248 | </varlistentry>
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249 |
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250 | <varlistentry id="pam_tally">
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251 | <term><command>pam_tally</command></term>
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252 | <listitem>
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253 | <para>is used to view or manipulate the <filename>faillog</filename>
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254 | file.</para>
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255 | <indexterm zone="Linux_PAM pam_tally">
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256 | <primary sortas="b-pam_tally">pam_tally</primary>
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257 | </indexterm>
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258 | </listitem>
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259 | </varlistentry>
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260 |
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261 | <varlistentry id="libpam">
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262 | <term><filename class='libraryfile'>libpam.[so,a]</filename></term>
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263 | <listitem>
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264 | <para>provides the interfaces between applications and the
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265 | PAM modules.</para>
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266 | <indexterm zone="Linux_PAM libpam">
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267 | <primary sortas="c-libpam">libpam.[so,a]</primary>
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268 | </indexterm>
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269 | </listitem>
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270 | </varlistentry>
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271 |
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272 | </variablelist>
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273 |
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274 | </sect2>
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275 |
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276 | </sect1>
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