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Update to giflib-5.1.3. Update to nasm-2.12.01. Update to nmap-7.10. Update to firefox-45.0.1. git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@17127 af4574ff-66df-0310-9fd7-8a98e5e911e0
355 lines
11 KiB
XML
355 lines
11 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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<!ENTITY sudo-download-http "http://www.sudo.ws/dist/sudo-&sudo-version;.tar.gz">
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<!ENTITY sudo-download-ftp "ftp://ftp.sudo.ws/pub/sudo/sudo-&sudo-version;.tar.gz">
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<!ENTITY sudo-md5sum "a977449587dc857e129bb20555b46af4">
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<!ENTITY sudo-size "2.6 MB">
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<!ENTITY sudo-buildsize "34 MB (with tests)">
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<!ENTITY sudo-time "0.4 SBU (with tests)">
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]>
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<sect1 id="sudo" xreflabel="Sudo-&sudo-version;">
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<?dbhtml filename="sudo.html"?>
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<sect1info>
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<othername>$LastChangedBy$</othername>
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<date>$Date$</date>
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</sect1info>
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<title>Sudo-&sudo-version;</title>
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<indexterm zone="sudo">
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<primary sortas="a-Sudo">Sudo</primary>
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</indexterm>
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<sect2 role="package">
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<title>Introduction to Sudo</title>
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<para>
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The <application>Sudo</application> package allows a system administrator
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to give certain users (or groups of users) the ability to run
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some (or all) commands as
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<systemitem class="username">root</systemitem> or another user while
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logging the commands and arguments.
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</para>
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&lfs79_checked;
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<bridgehead renderas="sect3">Package Information</bridgehead>
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<itemizedlist spacing="compact">
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<listitem>
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<para>
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Download (HTTP): <ulink url="&sudo-download-http;"/>
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</para>
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</listitem>
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<listitem>
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<para>
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Download (FTP): <ulink url="&sudo-download-ftp;"/>
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</para>
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</listitem>
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<listitem>
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<para>
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Download MD5 sum: &sudo-md5sum;
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</para>
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</listitem>
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<listitem>
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<para>
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Download size: &sudo-size;
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</para>
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</listitem>
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<listitem>
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<para>
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Estimated disk space required: &sudo-buildsize;
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</para>
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</listitem>
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<listitem>
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<para>
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Estimated build time: &sudo-time;
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</para>
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</listitem>
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</itemizedlist>
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<bridgehead renderas="sect3">Sudo Dependencies</bridgehead>
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<bridgehead renderas="sect4">Optional</bridgehead>
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<para role="optional">
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<xref linkend="linux-pam"/>,
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<xref linkend="mitkrb"/>,
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<xref linkend="openldap"/>,
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<xref linkend="server-mail"/> (that provides a
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<command>sendmail</command> command),
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<ulink url="http://www.openafs.org/">AFS</ulink>,
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<ulink url="http://www.fwtk.org/">FWTK</ulink>, and
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<ulink url="http://sourceforge.net/projects/opie/files/">Opie</ulink>
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<!-- <ulink url="http://www.rsa.com/node.aspx?id=1156">SecurID</ulink>-->
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</para>
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<para condition="html" role="usernotes">User Notes:
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<ulink url="&blfs-wiki;/sudo"/>
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</para>
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</sect2>
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<sect2 role="installation">
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<title>Installation of Sudo</title>
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<para>
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Install <application>Sudo</application> by running the following commands:
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</para>
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<!-- Developer: apparently it is disabled by default, although in configure it
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is written otherwise -disable-static \-->
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<screen><userinput>./configure --prefix=/usr \
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--libexecdir=/usr/lib \
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--with-secure-path \
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--with-all-insults \
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--with-env-editor \
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--docdir=/usr/share/doc/sudo-&sudo-version; \
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--with-passprompt="[sudo] password for %p" &&
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make</userinput></screen>
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<para>
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To test the results, issue: <command>env LC_ALL=C make check 2>&1
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| tee ../make-check.log</command>. Check the results with <command>grep
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failed ../make-check.log</command>.
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</para>
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<para>
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Now, as the <systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"><userinput>make install &&
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ln -sfv libsudo_util.so.0.0.0 /usr/lib/sudo/libsudo_util.so.0</userinput></screen>
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</sect2>
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<sect2 role="commands">
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<title>Command Explanations</title>
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<para>
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<parameter>--libexecdir=/usr/lib</parameter>: This switch controls where
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private programs are installed. Everything in that directory is a library, so
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they belong under <filename class="directory">/usr/lib</filename> instead of
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<filename class="directory">/usr/libexec</filename>.
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</para>
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<para>
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<parameter>--with-secure-path</parameter>: This switch transparently adds
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<filename class="directory">/sbin</filename> and <filename
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class="directory">/usr/sbin</filename> directories to the
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<envar>PATH</envar> environment variable.
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</para>
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<para>
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<parameter>--with-all-insults</parameter>: This switch includes all the
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<application>sudo</application> insult sets.
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</para>
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<para>
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<parameter>--with-env-editor</parameter>: This switch enables use of the
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environment variable EDITOR for <command>visudo</command>.
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</para>
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<para>
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<parameter>--with-passprompt</parameter>: This switch sets the prompt.
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</para>
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<para>
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<option>--without-pam</option>: Avoids building <application>PAM</application>
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support when <application>PAM</application> is installed on the system.
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</para>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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href="../../xincludes/static-libraries.xml"/>
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<note>
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<para>
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There are many options to <application>sudo</application>'s
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<command>configure</command> command. Check the
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<command>configure --help</command> output for a complete list.
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</para>
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</note>
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<para>
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<command>ln -sfv libsudo_util...</command>: works around a bug in the
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installation process, which links to the previously installed
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version (if there is one) instead of the new one.
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</para>
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</sect2>
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<sect2 role="configuration">
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<title>Configuring Sudo</title>
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<sect3 id="sudo-config">
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<title>Config File</title>
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<para>
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<filename>/etc/sudoers</filename>
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</para>
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<indexterm zone="sudo sudo-config">
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<primary sortas="e-etc-sudoers">/etc/sudoers</primary>
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</indexterm>
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</sect3>
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<sect3>
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<title>Configuration Information</title>
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<para>
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The <filename>sudoers</filename> file can be quite complicated. It
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is composed of two types of entries: aliases (basically variables) and
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user specifications (which specify who may run what). The installation
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installs a default configuration that has no privileges installed for any
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user.
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</para>
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<para>
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One example usage is to allow the system administrator to execute
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any program without typing a password each time root privileges are
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needed. This can be configured as:
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</para>
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<screen># User alias specification
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User_Alias ADMIN = YourLoginId
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# Allow people in group ADMIN to run all commands without a password
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ADMIN ALL = NOPASSWD: ALL</screen>
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<para>
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For details, see <command>man sudoers</command>.
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</para>
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<note>
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<para>
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The <application>Sudo</application> developers highly recommend
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using the <command>visudo</command> program to edit the
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<filename>sudoers</filename> file. This will provide basic sanity
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checking like syntax parsing and file permission to avoid some possible
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mistakes that could lead to a vulnerable configuration.
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</para>
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</note>
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<para>
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If <application>PAM</application> is installed on the system,
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<application>Sudo</application> is built with
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<application>PAM</application> support. In that case, issue the following
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command as the <systemitem class="username">root</systemitem> user
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to create the <application>PAM</application> configuration file:
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</para>
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<screen role="root"><userinput>cat > /etc/pam.d/sudo << "EOF"
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<literal># Begin /etc/pam.d/sudo
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# include the default auth settings
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auth include system-auth
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# include the default account settings
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account include system-account
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# Set default environment variables for the service user
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session required pam_env.so
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# include system session defaults
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session include system-session
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# End /etc/pam.d/sudo</literal>
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EOF
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chmod 644 /etc/pam.d/sudo</userinput></screen>
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</sect3>
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</sect2>
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<sect2 role="content">
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<title>Contents</title>
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<segmentedlist>
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<segtitle>Installed Programs</segtitle>
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<segtitle>Installed Libraries</segtitle>
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<segtitle>Installed Directories</segtitle>
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<seglistitem>
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<seg>
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sudo, sudoedit (symlink), sudoreplay, and visudo
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</seg>
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<seg>
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group_file.so, libsudo_util.so,
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sudoers.so, sudo_noexec.so, and system_group.so
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</seg>
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<seg>
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/etc/sudoers.d,
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/usr/lib/sudo,
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/usr/share/doc/sudo-&sudo-version;, and
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/var/{lib,run}/sudo
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</seg>
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</seglistitem>
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</segmentedlist>
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<variablelist>
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<bridgehead renderas="sect3">Short Descriptions</bridgehead>
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<?dbfo list-presentation="list"?>
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<?dbhtml list-presentation="table"?>
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<varlistentry id="sudo_prog">
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<term><command>sudo</command></term>
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<listitem>
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<para>
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executes a command as another user as permitted by
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the <filename>/etc/sudoers</filename> configuration file.
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</para>
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<indexterm zone="sudo sudo">
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<primary sortas="b-sudo">sudo</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="sudoedit">
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<term><command>sudoedit</command></term>
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<listitem>
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<para>
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is a symlink to <command>sudo</command> that implies the
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<option>-e</option> option to invoke an editor as another user.
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</para>
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<indexterm zone="sudo sudoedit">
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<primary sortas="b-sudoedit">sudoedit</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="sudoreplay">
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<term><command>sudoreplay</command></term>
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<listitem>
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<para>
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is used to play back or list the output
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logs created by <command>sudo</command>.
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</para>
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<indexterm zone="sudo sudoreplay">
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<primary sortas="b-sudoreplay">sudoreplay</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="visudo">
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<term><command>visudo</command></term>
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<listitem>
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<para>
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allows for safer editing of the <filename>sudoers</filename>
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file.
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</para>
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<indexterm zone="sudo visudo">
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<primary sortas="b-visudo">visudo</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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</variablelist>
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</sect2>
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</sect1>
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