[cf341b4] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[6732c094] | 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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[cf341b4] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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[fc876182] | 7 | <!ENTITY sudo-download-http "http://www.sudo.ws/sudo/dist/sudo-&sudo-version;.tar.gz">
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[926d146d] | 8 | <!ENTITY sudo-download-ftp "ftp://ftp.sudo.ws/pub/sudo/sudo-&sudo-version;.tar.gz">
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[ff56d2f] | 9 | <!ENTITY sudo-md5sum "f61577ec330ad1bd504c0e2eec6ea2d8">
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[8dc47f9] | 10 | <!ENTITY sudo-size "2.4 MB">
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| 11 | <!ENTITY sudo-buildsize "24 MB">
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[ff56d2f] | 12 | <!ENTITY sudo-time "0.4 SBU">
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[cf341b4] | 13 | ]>
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| 14 |
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[bcd2922] | 15 | <sect1 id="sudo" xreflabel="Sudo-&sudo-version;">
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[cf341b4] | 16 | <?dbhtml filename="sudo.html"?>
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| 17 |
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| 18 | <sect1info>
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[e19ad480] | 19 | <othername>$LastChangedBy$</othername>
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| 20 | <date>$Date$</date>
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[cf341b4] | 21 | </sect1info>
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| 22 |
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| 23 | <title>Sudo-&sudo-version;</title>
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| 24 |
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| 25 | <indexterm zone="sudo">
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[bcd2922] | 26 | <primary sortas="a-Sudo">Sudo</primary>
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[cf341b4] | 27 | </indexterm>
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| 28 |
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| 29 | <sect2 role="package">
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| 30 | <title>Introduction to Sudo</title>
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| 31 |
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[bcd2922] | 32 | <para>
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| 33 | The <application>Sudo</application> package allows a system administrator
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| 34 | to give certain users (or groups of users) the ability to run
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| 35 | some (or all) commands as
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| 36 | <systemitem class="username">root</systemitem> or another user while
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| 37 | logging the commands and arguments.
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| 38 | </para>
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[cf341b4] | 39 |
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[57945e0] | 40 | &lfs77_checked; &gcc5_checked;
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[a8d3d55a] | 41 |
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[cf341b4] | 42 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 43 | <itemizedlist spacing="compact">
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| 44 | <listitem>
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[bcd2922] | 45 | <para>
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| 46 | Download (HTTP): <ulink url="&sudo-download-http;"/>
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| 47 | </para>
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[cf341b4] | 48 | </listitem>
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| 49 | <listitem>
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[bcd2922] | 50 | <para>
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| 51 | Download (FTP): <ulink url="&sudo-download-ftp;"/>
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| 52 | </para>
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[cf341b4] | 53 | </listitem>
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| 54 | <listitem>
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[bcd2922] | 55 | <para>
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| 56 | Download MD5 sum: &sudo-md5sum;
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| 57 | </para>
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[cf341b4] | 58 | </listitem>
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| 59 | <listitem>
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[bcd2922] | 60 | <para>
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| 61 | Download size: &sudo-size;
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| 62 | </para>
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[cf341b4] | 63 | </listitem>
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| 64 | <listitem>
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[bcd2922] | 65 | <para>
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| 66 | Estimated disk space required: &sudo-buildsize;
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| 67 | </para>
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[cf341b4] | 68 | </listitem>
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| 69 | <listitem>
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[bcd2922] | 70 | <para>
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| 71 | Estimated build time: &sudo-time;
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| 72 | </para>
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[cf341b4] | 73 | </listitem>
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| 74 | </itemizedlist>
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| 75 |
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| 76 | <bridgehead renderas="sect3">Sudo Dependencies</bridgehead>
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| 77 |
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| 78 | <bridgehead renderas="sect4">Optional</bridgehead>
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[bcd2922] | 79 | <para role="optional">
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| 80 | <xref linkend="linux-pam"/>,
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| 81 | <xref linkend="mitkrb"/>,
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| 82 | <xref linkend="openldap"/>,
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[6b4f8529] | 83 | <xref linkend="server-mail"/> (that provides a
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| 84 | <command>sendmail</command> command),
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| 85 | <ulink url="http://www.openafs.org/">AFS</ulink>,
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| 86 | <ulink url="http://www.fwtk.org/">FWTK</ulink>,
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| 87 | <ulink url="http://sourceforge.net/projects/opie/files/">Opie</ulink>, and
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[bcd2922] | 88 | <ulink url="http://www.rsa.com/node.aspx?id=1156">SecurID</ulink>
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| 89 | </para>
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[b35e86b2] | 90 |
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[3597eb6] | 91 | <para condition="html" role="usernotes">User Notes:
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[bcd2922] | 92 | <ulink url="&blfs-wiki;/sudo"/>
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| 93 | </para>
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[cf341b4] | 94 | </sect2>
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| 95 |
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| 96 | <sect2 role="installation">
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| 97 | <title>Installation of Sudo</title>
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| 98 |
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[bcd2922] | 99 | <para>
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[6e5d584] | 100 | Install <application>Sudo</application> by running the following commands:
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[bcd2922] | 101 | </para>
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[cf341b4] | 102 |
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[1c69133] | 103 | <!-- Developer: apparently it is disabled by default, although in configure it
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| 104 | is written otherwise -disable-static \-->
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[b9d56ad4] | 105 | <screen><userinput>./configure --prefix=/usr \
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[edaee95] | 106 | --libexecdir=/usr/lib \
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[1a657ca] | 107 | --with-secure-path \
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[b9d56ad4] | 108 | --with-all-insults \
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| 109 | --with-env-editor \
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| 110 | --docdir=/usr/share/doc/sudo-&sudo-version; \
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[439ebd01] | 111 | --with-passprompt="[sudo] password for %p" &&
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[cf341b4] | 112 | make</userinput></screen>
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| 113 |
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[bcd2922] | 114 | <para>
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[6b4f8529] | 115 | To test the results, issue: <command>env LC_ALL=C make check 2>&1
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| 116 | | tee ../make-check.log</command>. Check the results with <command>grep
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| 117 | failed ../make-check.log</command>.
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[bcd2922] | 118 | </para>
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[21755bc] | 119 |
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[bcd2922] | 120 | <para>
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| 121 | Now, as the <systemitem class="username">root</systemitem> user:
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| 122 | </para>
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[cf341b4] | 123 |
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[2809c8c] | 124 | <screen role="root"><userinput>make install &&
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| 125 | ln -sfv libsudo_util.so.0.0.0 /usr/lib/sudo/libsudo_util.so.0</userinput></screen>
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[cf341b4] | 126 |
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| 127 | </sect2>
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| 128 |
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| 129 | <sect2 role="commands">
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| 130 | <title>Command Explanations</title>
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| 131 |
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[663b79c2] | 132 | <para>
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[edaee95] | 133 | <parameter>--libexecdir=/usr/lib</parameter>: This switch controls where
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[663b79c2] | 134 | private programs are installed. Everything in that directory is a library, so
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| 135 | they belong under <filename class="directory">/usr/lib</filename> instead of
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| 136 | <filename class="directory">/usr/libexec</filename>.
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[8466229] | 137 | </para>
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| 138 |
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| 139 | <para>
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| 140 | <parameter>--with-secure-path</parameter>: This switch transparently adds
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| 141 | <filename class="directory">/sbin</filename> and <filename
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| 142 | class="directory">/usr/sbin</filename> directories to the
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| 143 | <envar>PATH</envar> environment variable.
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[663b79c2] | 144 | </para>
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| 145 |
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[bcd2922] | 146 | <para>
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[f3d174f] | 147 | <parameter>--with-all-insults</parameter>: This switch includes all the
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[bcd2922] | 148 | <application>sudo</application> insult sets.
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| 149 | </para>
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[cf341b4] | 150 |
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[bcd2922] | 151 | <para>
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[f3d174f] | 152 | <parameter>--with-env-editor</parameter>: This switch enables use of the
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[bcd2922] | 153 | environment variable EDITOR for <command>visudo</command>.
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| 154 | </para>
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[8890b85f] | 155 |
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[f3d174f] | 156 | <para>
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| 157 | <parameter>--with-passprompt</parameter>: This switch sets the prompt.
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| 158 | </para>
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| 159 |
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[14c71e0a] | 160 | <para>
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[be7383c] | 161 | <option>--without-pam</option>: Avoids building <application>PAM</application>
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[14c71e0a] | 162 | support when <application>PAM</application> is installed on the system.
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| 163 | </para>
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| 164 |
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[b9d56ad4] | 165 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 166 | href="../../xincludes/static-libraries.xml"/>
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| 167 |
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[33d90fe] | 168 | <note>
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[bcd2922] | 169 | <para>
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| 170 | There are many options to <application>sudo</application>'s
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| 171 | <command>configure</command> command. Check the
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| 172 | <command>configure --help</command> output for a complete list.
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| 173 | </para>
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[33d90fe] | 174 | </note>
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[cf341b4] | 175 |
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[2809c8c] | 176 | <para>
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| 177 | <command>ln -sfv libsudo_util...</command>: works around a bug in the
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| 178 | installation process, which links to the previously installed
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| 179 | version (if there is one) instead of the new one.
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| 180 | </para>
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| 181 |
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[cf341b4] | 182 | </sect2>
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| 183 |
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| 184 | <sect2 role="configuration">
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| 185 | <title>Configuring Sudo</title>
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| 186 |
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| 187 | <sect3 id="sudo-config">
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| 188 | <title>Config File</title>
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| 189 |
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[7a47afc] | 190 | <para>
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| 191 | <filename>/etc/sudoers</filename>
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| 192 | </para>
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[cf341b4] | 193 |
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| 194 | <indexterm zone="sudo sudo-config">
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| 195 | <primary sortas="e-etc-sudoers">/etc/sudoers</primary>
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| 196 | </indexterm>
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| 197 |
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| 198 | </sect3>
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| 199 |
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| 200 | <sect3>
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| 201 | <title>Configuration Information</title>
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| 202 |
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[bcd2922] | 203 | <para>
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| 204 | The <filename>sudoers</filename> file can be quite complicated. It
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| 205 | is composed of two types of entries: aliases (basically variables) and
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| 206 | user specifications (which specify who may run what). The installation
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| 207 | installs a default configuration that has no privileges installed for any
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| 208 | user.
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| 209 | </para>
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[cf341b4] | 210 |
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[bcd2922] | 211 | <para>
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| 212 | One example usage is to allow the system administrator to execute
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| 213 | any program without typing a password each time root privileges are
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| 214 | needed. This can be configured as:
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| 215 | </para>
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[bccbdaea] | 216 |
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[ed025d6] | 217 | <screen># User alias specification
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[cf341b4] | 218 | User_Alias ADMIN = YourLoginId
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| 219 |
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| 220 | # Allow people in group ADMIN to run all commands without a password
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| 221 | ADMIN ALL = NOPASSWD: ALL</screen>
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| 222 |
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[bcd2922] | 223 | <para>
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| 224 | For details, see <command>man sudoers</command>.
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| 225 | </para>
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[cf341b4] | 226 |
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[3c0f868f] | 227 | <note>
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[bcd2922] | 228 | <para>
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| 229 | The <application>Sudo</application> developers highly recommend
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| 230 | using the <command>visudo</command> program to edit the
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| 231 | <filename>sudoers</filename> file. This will provide basic sanity
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| 232 | checking like syntax parsing and file permission to avoid some possible
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| 233 | mistakes that could lead to a vulnerable configuration.
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| 234 | </para>
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[3c0f868f] | 235 | </note>
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| 236 |
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[bcd2922] | 237 | <para>
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[14c71e0a] | 238 | If <application>PAM</application> is installed on the system,
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| 239 | <application>Sudo</application> is built with
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| 240 | <application>PAM</application> support. In that case, issue the following
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[bcd2922] | 241 | command as the <systemitem class="username">root</systemitem> user
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| 242 | to create the <application>PAM</application> configuration file:
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| 243 | </para>
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[8890b85f] | 244 |
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[add8d4f] | 245 | <screen role="root"><userinput>cat > /etc/pam.d/sudo << "EOF"
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| 246 | <literal># Begin /etc/pam.d/sudo
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[b3a4f60] | 247 |
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| 248 | # include the default auth settings
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| 249 | auth include system-auth
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| 250 |
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| 251 | # include the default account settings
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| 252 | account include system-account
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| 253 |
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| 254 | # Set default environment variables for the service user
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| 255 | session required pam_env.so
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| 256 |
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| 257 | # include system session defaults
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| 258 | session include system-session
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| 259 |
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[add8d4f] | 260 | # End /etc/pam.d/sudo</literal>
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[b3a4f60] | 261 | EOF
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| 262 | chmod 644 /etc/pam.d/sudo</userinput></screen>
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[fd7e0ed6] | 263 |
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[cf341b4] | 264 | </sect3>
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| 265 |
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| 266 | </sect2>
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| 267 |
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| 268 | <sect2 role="content">
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| 269 | <title>Contents</title>
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| 270 |
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| 271 | <segmentedlist>
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| 272 | <segtitle>Installed Programs</segtitle>
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[7a47afc] | 273 | <segtitle>Installed Libraries</segtitle>
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[cf341b4] | 274 | <segtitle>Installed Directories</segtitle>
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| 275 |
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| 276 | <seglistitem>
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[bcd2922] | 277 | <seg>
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[a1e0f76] | 278 | sudo, sudoedit (symlink), sudoreplay, and visudo
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[bcd2922] | 279 | </seg>
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| 280 | <seg>
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[6b4f8529] | 281 | group_file.so, libsudo_util.so,
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| 282 | sudoers.so, sudo_noexec.so, and system_group.so
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[bcd2922] | 283 | </seg>
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| 284 | <seg>
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[7a47afc] | 285 | /etc/sudoers.d,
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[b378aa0] | 286 | /usr/lib/sudo,
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[ed2179c9] | 287 | /usr/share/doc/sudo-&sudo-version;,
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| 288 | /var/lib/sudo, and
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| 289 | /var/run/sudo
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[bcd2922] | 290 | </seg>
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[cf341b4] | 291 | </seglistitem>
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| 292 | </segmentedlist>
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| 293 |
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| 294 | <variablelist>
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| 295 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 296 | <?dbfo list-presentation="list"?>
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| 297 | <?dbhtml list-presentation="table"?>
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| 298 |
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| 299 | <varlistentry id="sudo_prog">
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| 300 | <term><command>sudo</command></term>
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| 301 | <listitem>
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[bcd2922] | 302 | <para>
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| 303 | executes a command as another user as permitted by
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| 304 | the <filename>/etc/sudoers</filename> configuration file.
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[cf341b4] | 305 | </para>
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| 306 | <indexterm zone="sudo sudo">
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| 307 | <primary sortas="b-sudo">sudo</primary>
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| 308 | </indexterm>
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| 309 | </listitem>
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| 310 | </varlistentry>
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| 311 |
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| 312 | <varlistentry id="sudoedit">
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| 313 | <term><command>sudoedit</command></term>
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| 314 | <listitem>
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[bcd2922] | 315 | <para>
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[a1e0f76] | 316 | is a symlink to <command>sudo</command> that implies the
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[bcd2922] | 317 | <option>-e</option> option to invoke an editor as another user.
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| 318 | </para>
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[cf341b4] | 319 | <indexterm zone="sudo sudoedit">
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| 320 | <primary sortas="b-sudoedit">sudoedit</primary>
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| 321 | </indexterm>
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| 322 | </listitem>
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| 323 | </varlistentry>
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| 324 |
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[3c0f868f] | 325 | <varlistentry id="visudo">
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| 326 | <term><command>visudo</command></term>
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| 327 | <listitem>
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[bcd2922] | 328 | <para>
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| 329 | allows for safer editing of the <filename>sudoers</filename>
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| 330 | file.
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| 331 | </para>
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[3c0f868f] | 332 | <indexterm zone="sudo visudo">
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| 333 | <primary sortas="b-visudo">visudo</primary>
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| 334 | </indexterm>
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| 335 | </listitem>
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| 336 | </varlistentry>
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| 337 |
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[61b8305] | 338 | <varlistentry id="sudoreplay">
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| 339 | <term><command>sudoreplay</command></term>
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| 340 | <listitem>
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[bcd2922] | 341 | <para>
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[0d7900a] | 342 | is used to play back or list the output
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[bcd2922] | 343 | logs created by <command>sudo</command>.
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| 344 | </para>
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[61b8305] | 345 | <indexterm zone="sudo sudoreplay">
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| 346 | <primary sortas="b-sudoreplay">sudoreplay</primary>
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| 347 | </indexterm>
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| 348 | </listitem>
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| 349 | </varlistentry>
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[3c0f868f] | 350 |
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[cf341b4] | 351 | </variablelist>
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| 352 |
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| 353 | </sect2>
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| 354 |
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| 355 | </sect1>
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