mirror of
https://github.com/Zeckmathederg/glfs.git
synced 2025-01-27 09:42:12 +08:00
43b1dad3c7
Most remaining tags in genlib, genutils, and sysutils git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@20396 af4574ff-66df-0310-9fd7-8a98e5e911e0
268 lines
8.1 KiB
XML
268 lines
8.1 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 at-download-http "http://ftp.debian.org/debian/pool/main/a/at/at_&at-version;.orig.tar.gz">
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<!ENTITY at-download-ftp " ">
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<!ENTITY at-md5sum "e7bd7b785b2cbb17e133d6bdc0fb099e">
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<!ENTITY at-size "128 KB">
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<!ENTITY at-buildsize "1.8 MB">
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<!ENTITY at-time "less than 0.1 SBU">
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]>
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<sect1 id="at" xreflabel="Fcron-&at-version;">
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<?dbhtml filename="at.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>at-&at-version;</title>
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<indexterm zone="at">
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<primary sortas="a-at">at</primary>
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</indexterm>
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<sect2 role="package">
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<title>Introduction to at</title>
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<para>The <application>at</application> package provide delayed job execution
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and batch processing. It is required for Linux Standards Base (LSB)
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conformance.</para>
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&lfs83_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>Download (HTTP): <ulink url="&at-download-http;"/></para>
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</listitem>
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<listitem>
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<para>Download (FTP): <ulink url="&at-download-ftp;"/></para>
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</listitem>
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<listitem>
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<para>Download MD5 sum: &at-md5sum;</para>
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</listitem>
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<listitem>
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<para>Download size: &at-size;</para>
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</listitem>
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<listitem>
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<para>Estimated disk space required: &at-buildsize;</para>
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</listitem>
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<listitem>
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<para>Estimated build time: &at-time;</para>
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</listitem>
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</itemizedlist>
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<bridgehead renderas="sect3">at Dependencies</bridgehead>
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<bridgehead renderas="sect4">Required</bridgehead>
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<para role="required">
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An <xref linkend="server-mail"/>
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</para>
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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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</para>
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<para condition="html" role="usernotes">User Notes:
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<ulink url="&blfs-wiki;/at"/></para>
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</sect2>
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<sect2 role="installation">
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<title>Installation of at</title>
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<para>Before building <application>at</application>, as the
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<systemitem class="username">root</systemitem> user you should create
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the group and user <systemitem class="username">atd</systemitem> which
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will run the <command>atd</command> daemon. Also ensure the working
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directory for the daemon exists:</para>
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<screen role="root"><userinput>groupadd -g 17 atd &&
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useradd -d /dev/null -c "atd daemon" -g atd -s /bin/false -u 17 atd &&
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mkdir -p /var/spool/cron</userinput></screen>
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<para>
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Fix <filename>Makefile.in</filename> so that the documentation directory
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is installed in the specified docdir:
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</para>
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<screen><userinput>sed -i '/docdir/s/=.*/= @docdir@/' Makefile.in</userinput></screen>
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<para>
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Regenerate the build files to be consistent with this package version:
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</para>
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<screen><userinput>autoreconf</userinput></screen>
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<para>Install <application>at</application> with the following
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commands:</para>
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<screen revision="sysv"><userinput>./configure --with-daemon_username=atd \
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--with-daemon_groupname=atd \
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SENDMAIL=/usr/sbin/sendmail &&
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make -j1</userinput></screen>
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<screen revision="systemd"><userinput>./configure --with-daemon_username=atd \
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--with-daemon_groupname=atd \
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SENDMAIL=/usr/sbin/sendmail \
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--with-systemdsystemunitdir=/lib/systemd/system &&
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make -j1</userinput></screen>
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<para>This package does not come with a test suite.</para>
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<para>Now, as the <systemitem class="username">root</systemitem> user:</para>
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<screen role="root"><userinput>make install \
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docdir=/usr/share/doc/at-&at-version; \
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atdocdir=/usr/share/doc/at-&at-version; </userinput></screen>
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</sect2>
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<sect2 role="configuration">
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<title>Configuring at</title>
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<sect3 id="at-config">
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<title>Config Files</title>
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<para> <filename>/etc/at.allow</filename> and
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<filename>/etc/at.deny</filename> determines who can submit jobs via at
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or batch.</para>
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<indexterm zone="at at-config">
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<primary sortas="e-etc-at.allow">/etc/at.allow</primary>
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</indexterm>
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<indexterm zone="at at-config">
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<primary sortas="e-etc-at.deny">/etc/at.deny</primary>
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</indexterm>
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</sect3>
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<sect3 id="at-init">
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<title><phrase revision="sysv">Boot Script</phrase>
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<phrase revision="systemd">Systemd Unit</phrase></title>
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<para revision="sysv">Install the <filename>/etc/init.d/atd</filename>
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init script from the <xref linkend="bootscripts"/> package.</para>
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<para revision="systemd">
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To start the <command>atd</command> daemon at boot,
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enable the previously installed systemd unit by
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running the following command as the
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<systemitem class="username">root</systemitem> user:
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</para>
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<indexterm zone="at at-init">
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<primary sortas="f-at">at</primary>
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</indexterm>
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<screen role="root" revision="sysv"><userinput>make install-atd</userinput></screen>
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<screen role="root" revision="systemd"><userinput>systemctl enable atd</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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at, atd, atq (symlink), atrm (symlink), atrun, and batch
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</seg>
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<seg>
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None
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</seg>
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<seg>
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/var/spool/cron/at{jobs,spool} and
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/usr/share/doc/at-&at-version;
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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="at-prog">
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<term><command>at</command></term>
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<listitem>
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<para>queues, examines or deletes jobs for later execution.</para>
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<indexterm zone="at at-prog">
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<primary sortas="b-at">at</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="atd">
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<term><command>atd</command></term>
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<listitem>
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<para>is the daemon that runs jobs queued for later execution.</para>
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<indexterm zone="at atd">
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<primary sortas="b-atd">atd</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="atq">
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<term><command>atq</command></term>
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<listitem>
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<para>lists the user's pending jobs, or all jobs, if superuser.</para>
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<indexterm zone="at atq">
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<primary sortas="b-atq">atq</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="atrm">
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<term><command>atrm</command></term>
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<listitem>
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<para>deletes jobs, identified by their job number.</para>
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<indexterm zone="at atrm">
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<primary sortas="b-atrm">atrm</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="atrun">
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<term><command>atrun</command></term>
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<listitem>
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<para>runs jobs queued for later execution.</para>
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<indexterm zone="at atrun">
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<primary sortas="b-atrun">atrun</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="batch">
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<term><command>batch</command></term>
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<listitem>
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<para>is a script that executes commands when system load levels permit.
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</para>
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<indexterm zone="at batch">
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<primary sortas="b-batch">batch</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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