| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 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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| 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 at-download-http "http://ftp.debian.org/debian/pool/main/a/at/at_&at-version;.orig.tar.gz">
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| 8 | <!ENTITY at-download-ftp " ">
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| 9 | <!ENTITY at-md5sum "1cec945506b5ddf1d776c92c315fc581">
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| 10 | <!ENTITY at-size "272 KB">
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| 11 | <!ENTITY at-buildsize "1.6 MB">
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| 12 | <!ENTITY at-time "less than 0.1 SBU">
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| 13 | ]>
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| 14 |
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| 15 | <sect1 id="at" xreflabel="Fcron-&at-version;">
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| 16 | <?dbhtml filename="at.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>at-&at-version;</title>
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| 24 |
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| 25 | <indexterm zone="at">
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| 26 | <primary sortas="a-at">at</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 at</title>
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| 31 |
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| 32 | <para>
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| 33 | The <application>at</application> package provide delayed job execution
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| 34 | and batch processing. It is required for Linux Standards Base (LSB)
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| 35 | conformance.
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| 36 | </para>
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| 37 |
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| 38 | &lfs91_checked;
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| 39 |
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| 40 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 41 | <itemizedlist spacing="compact">
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| 42 | <listitem>
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| 43 | <para>
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| 44 | Download (HTTP): <ulink url="&at-download-http;"/>
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| 45 | </para>
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| 46 | </listitem>
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| 47 | <listitem>
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| 48 | <para>
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| 49 | Download (FTP): <ulink url="&at-download-ftp;"/>
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| 50 | </para>
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| 51 | </listitem>
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| 52 | <listitem>
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| 53 | <para>
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| 54 | Download MD5 sum: &at-md5sum;
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| 55 | </para>
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| 56 | </listitem>
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| 57 | <listitem>
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| 58 | <para>
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| 59 | Download size: &at-size;
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| 60 | </para>
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| 61 | </listitem>
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| 62 | <listitem>
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| 63 | <para>
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| 64 | Estimated disk space required: &at-buildsize;
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| 65 | </para>
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| 66 | </listitem>
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| 67 | <listitem>
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| 68 | <para>
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| 69 | Estimated build time: &at-time;
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| 70 | </para>
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| 71 | </listitem>
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| 72 | </itemizedlist>
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| 73 |
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| 74 | <bridgehead renderas="sect3">at Dependencies</bridgehead>
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| 75 |
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| 76 | <bridgehead renderas="sect4">Required</bridgehead>
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| 77 | <para role="required">
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| 78 | An <xref linkend="server-mail"/>
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| 79 | </para>
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| 80 |
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| 81 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 82 | <para role="optional">
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| 83 | <xref linkend="linux-pam"/>
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| 84 | </para>
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| 85 |
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| 86 | <para condition="html" role="usernotes">User Notes:
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| 87 | <ulink url="&blfs-wiki;/at"/></para>
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| 88 |
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| 89 | </sect2>
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| 90 |
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| 91 | <sect2 role="installation">
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| 92 | <title>Installation of at</title>
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| 93 |
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| 94 | <para>
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| 95 | Before building <application>at</application>, as the
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| 96 | <systemitem class="username">root</systemitem> user you should create
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| 97 | the group and user <systemitem class="username">atd</systemitem> which
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| 98 | will run the <command>atd</command> daemon. Also ensure the working
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| 99 | directory for the daemon exists:
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| 100 | </para>
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| 101 |
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| 102 | <screen role="root"><userinput>groupadd -g 17 atd &&
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| 103 | useradd -d /dev/null -c "atd daemon" -g atd -s /bin/false -u 17 atd &&
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| 104 | mkdir -p /var/spool/cron</userinput></screen>
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| 105 |
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| 106 | <para>
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| 107 | Fix <filename>Makefile.in</filename> so that the documentation directory
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| 108 | is installed in the specified docdir:
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| 109 | </para>
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| 110 |
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| 111 | <screen><userinput>sed -i '/docdir/s/=.*/= @docdir@/' Makefile.in</userinput></screen>
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| 112 |
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| 113 | <para>
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| 114 | Regenerate the build files to be consistent with this package version:
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| 115 | </para>
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| 116 |
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| 117 | <screen><userinput>autoreconf</userinput></screen>
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| 118 |
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| 119 | <para>
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| 120 | Install <application>at</application> with the following
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| 121 | commands:
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| 122 | </para>
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| 123 |
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| 124 | <screen revision="sysv"><userinput>./configure --with-daemon_username=atd \
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| 125 | --with-daemon_groupname=atd \
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| 126 | SENDMAIL=/usr/sbin/sendmail &&
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| 127 |
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| 128 | make -j1</userinput></screen>
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| 129 |
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| 130 | <screen revision="systemd"><userinput>./configure --with-daemon_username=atd \
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| 131 | --with-daemon_groupname=atd \
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| 132 | SENDMAIL=/usr/sbin/sendmail \
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| 133 | --with-systemdsystemunitdir=/lib/systemd/system &&
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| 134 | make -j1</userinput></screen>
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| 135 |
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| 136 | <para>
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| 137 | This package does not come with a test suite.
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| 138 | </para>
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| 139 |
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| 140 | <para>
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| 141 | Now, as the <systemitem class="username">root</systemitem> user:
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| 142 | </para>
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| 143 |
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| 144 | <screen role="root"><userinput>make install docdir=/usr/share/doc/at-&at-version; \
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| 145 | atdocdir=/usr/share/doc/at-&at-version;</userinput></screen>
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| 146 |
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| 147 | </sect2>
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| 148 |
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| 149 | <sect2 role="configuration">
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| 150 | <title>Configuring at</title>
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| 151 |
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| 152 | <sect3 id="at-config">
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| 153 | <title>Config Files</title>
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| 154 |
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| 155 | <para>
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| 156 | <filename>/etc/at.allow</filename> and
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| 157 | <filename>/etc/at.deny</filename> determines who can submit jobs via at
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| 158 | or batch.
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| 159 | </para>
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| 160 |
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| 161 | <indexterm zone="at at-config">
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| 162 | <primary sortas="e-etc-at.allow">/etc/at.allow</primary>
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| 163 | </indexterm>
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| 164 |
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| 165 | <indexterm zone="at at-config">
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| 166 | <primary sortas="e-etc-at.deny">/etc/at.deny</primary>
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| 167 | </indexterm>
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| 168 |
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| 169 | </sect3>
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| 170 |
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| 171 | <sect3 id="at-init">
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| 172 | <title><phrase revision="sysv">Boot Script</phrase>
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| 173 | <phrase revision="systemd">Systemd Unit</phrase></title>
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| 174 |
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| 175 | <para revision="sysv">
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| 176 | Install the <filename>/etc/init.d/atd</filename>
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| 177 | init script from the <xref linkend="bootscripts"/> package.
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| 178 | </para>
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| 179 |
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| 180 | <para revision="systemd">
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| 181 | To start the <command>atd</command> daemon at boot,
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| 182 | enable the previously installed systemd unit by
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| 183 | running the following command as the
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| 184 | <systemitem class="username">root</systemitem> user:
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| 185 | </para>
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| 186 |
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| 187 | <indexterm zone="at at-init">
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| 188 | <primary sortas="f-at">at</primary>
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| 189 | </indexterm>
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| 190 |
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| 191 | <screen role="root" revision="sysv"><userinput>make install-atd</userinput></screen>
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| 192 |
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| 193 | <screen role="root" revision="systemd"><userinput>systemctl enable atd</userinput></screen>
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| 194 |
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| 195 | </sect3>
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| 196 |
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| 197 | </sect2>
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| 198 |
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| 199 | <sect2 role="content">
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| 200 | <title>Contents</title>
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| 201 |
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| 202 | <segmentedlist>
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| 203 | <segtitle>Installed Programs</segtitle>
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| 204 | <segtitle>Installed Libraries</segtitle>
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| 205 | <segtitle>Installed Directories</segtitle>
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| 206 |
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| 207 | <seglistitem>
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| 208 | <seg>
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| 209 | at, atd, atq (symlink), atrm (symlink), atrun, and batch
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| 210 | </seg>
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| 211 | <seg>
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| 212 | None
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| 213 | </seg>
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| 214 | <seg>
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| 215 | /var/spool/cron/at{jobs,spool} and
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| 216 | /usr/share/doc/at-&at-version;
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| 217 | </seg>
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| 218 | </seglistitem>
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| 219 | </segmentedlist>
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| 220 |
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| 221 | <variablelist>
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| 222 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 223 | <?dbfo list-presentation="list"?>
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| 224 | <?dbhtml list-presentation="table"?>
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| 225 |
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| 226 | <varlistentry id="at-prog">
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| 227 | <term><command>at</command></term>
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| 228 | <listitem>
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| 229 | <para>
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| 230 | queues, examines or deletes jobs for later execution.
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| 231 | </para>
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| 232 | <indexterm zone="at at-prog">
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| 233 | <primary sortas="b-at">at</primary>
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| 234 | </indexterm>
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| 235 | </listitem>
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| 236 | </varlistentry>
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| 237 |
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| 238 | <varlistentry id="atd">
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| 239 | <term><command>atd</command></term>
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| 240 | <listitem>
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| 241 | <para>
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| 242 | is the daemon that runs jobs queued for later execution.
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| 243 | </para>
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| 244 | <indexterm zone="at atd">
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| 245 | <primary sortas="b-atd">atd</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="atq">
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| 251 | <term><command>atq</command></term>
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| 252 | <listitem>
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| 253 | <para>
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| 254 | lists the user's pending jobs, or all jobs, if superuser.
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| 255 | </para>
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| 256 | <indexterm zone="at atq">
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| 257 | <primary sortas="b-atq">atq</primary>
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| 258 | </indexterm>
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| 259 | </listitem>
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| 260 | </varlistentry>
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| 261 |
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| 262 | <varlistentry id="atrm">
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| 263 | <term><command>atrm</command></term>
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| 264 | <listitem>
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| 265 | <para>
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| 266 | deletes jobs, identified by their job number.
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| 267 | </para>
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| 268 | <indexterm zone="at atrm">
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| 269 | <primary sortas="b-atrm">atrm</primary>
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| 270 | </indexterm>
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| 271 | </listitem>
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| 272 | </varlistentry>
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| 273 |
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| 274 | <varlistentry id="atrun">
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| 275 | <term><command>atrun</command></term>
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| 276 | <listitem>
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| 277 | <para>
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| 278 | runs jobs queued for later execution.
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| 279 | </para>
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| 280 | <indexterm zone="at atrun">
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| 281 | <primary sortas="b-atrun">atrun</primary>
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| 282 | </indexterm>
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| 283 | </listitem>
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| 284 | </varlistentry>
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| 285 |
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| 286 | <varlistentry id="batch">
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| 287 | <term><command>batch</command></term>
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| 288 | <listitem>
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| 289 | <para>
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| 290 | is a script that executes commands when system load levels permit.
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| 291 | </para>
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| 292 | <indexterm zone="at batch">
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| 293 | <primary sortas="b-batch">batch</primary>
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| 294 | </indexterm>
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| 295 | </listitem>
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| 296 | </varlistentry>
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| 297 |
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| 298 | </variablelist>
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| 299 |
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| 300 | </sect2>
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| 301 |
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| 302 | </sect1>
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