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.de.debian.org/debian/pool/main/a/at/at_&at-version;.orig.tar.gz">
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8 | <!ENTITY at-download-ftp "ftp://ftp.de.debian.org/debian/pool/main/a/at/at_&at-version;.orig.tar.gz">
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9 | <!ENTITY at-md5sum "d41cfd79033b6e49a8838add59a42ac6">
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10 | <!ENTITY at-size "124 KB">
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11 | <!ENTITY at-buildsize "1.8 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>The <application>at</application> package provide delayed job execution
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33 | and batch processing. It is required for Linux Standards Base (LSB)
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34 | conformance.</para>
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35 |
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36 | &lfs74_checked;
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37 |
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38 | <bridgehead renderas="sect3">Package Information</bridgehead>
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39 | <itemizedlist spacing="compact">
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40 | <listitem>
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41 | <para>Download (HTTP): <ulink url="&at-download-http;"/></para>
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42 | </listitem>
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43 | <listitem>
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44 | <para>Download (FTP): <ulink url="&at-download-ftp;"/></para>
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45 | </listitem>
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46 | <listitem>
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47 | <para>Download MD5 sum: &at-md5sum;</para>
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48 | </listitem>
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49 | <listitem>
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50 | <para>Download size: &at-size;</para>
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51 | </listitem>
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52 | <listitem>
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53 | <para>Estimated disk space required: &at-buildsize;</para>
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54 | </listitem>
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55 | <listitem>
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56 | <para>Estimated build time: &at-time;</para>
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57 | </listitem>
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58 | </itemizedlist>
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59 |
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60 | <bridgehead renderas="sect3">at Dependencies</bridgehead>
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61 |
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62 | <bridgehead renderas="sect4">Required</bridgehead>
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63 | <para role="required">
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64 | An MTA such as <xref linkend="postfix"/>,
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65 | <xref linkend="sendmail"/>, or
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66 | <xref linkend="exim"/>
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67 | </para>
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68 |
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69 | <bridgehead renderas="sect4">Optional</bridgehead>
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70 | <para role="optional">
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71 | <xref linkend="linux-pam"/>
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72 | </para>
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73 |
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74 | <para condition="html" role="usernotes">User Notes:
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75 | <ulink url="&blfs-wiki;/at"/></para>
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76 |
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77 | </sect2>
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78 |
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79 | <sect2 role="installation">
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80 | <title>Installation of at</title>
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81 |
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82 | <para>Before building <application>at</application>, as the
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83 | <systemitem class="username">root</systemitem> user you should create
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84 | the group and user <systemitem class="username">atd</systemitem> which
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85 | will run the <command>atd</command> daemon. Also ensure the working
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86 | directory for the daemon exists:</para>
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87 |
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88 | <screen role="root"><userinput>groupadd -g 17 atd &&
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89 | useradd -d /dev/null -c "atd daemon" -g atd -s /bin/false -u 17 atd &&
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90 | mkdir -p /var/spool/cron</userinput></screen>
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91 |
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92 | <para>Install <application>at</application> with the following
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93 | commands:</para>
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94 |
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95 | <screen><userinput>./configure --with-daemon_username=atd \
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96 | --with-daemon_groupname=atd &&
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97 | make</userinput></screen>
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98 |
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99 | <para>This package does not come with a test suite.</para>
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100 |
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101 | <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
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102 |
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103 | <screen role="root"><userinput>make install</userinput></screen>
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104 |
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105 | </sect2>
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106 |
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107 | <sect2 role="configuration">
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108 | <title>Configuring at</title>
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109 |
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110 | <sect3 id="at-config">
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111 | <title>Config Files</title>
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112 |
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113 | <para> <filename>/etc/at.allow</filename> and
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114 | <filename>/etc/at.deny</filename> determines who can submit jobs via at
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115 | or batch.</para>
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116 |
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117 | <indexterm zone="at at-config">
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118 | <primary sortas="e-etc-at.allow">/etc/at.allow</primary>
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119 | </indexterm>
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120 |
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121 | <indexterm zone="at at-config">
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122 | <primary sortas="e-etc-at.deny">/etc/at.deny</primary>
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123 | </indexterm>
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124 |
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125 | </sect3>
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126 |
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127 | <sect3 id="at-init">
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128 | <title>Boot Script</title>
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129 |
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130 | <para>Install the <filename>/etc/init.d/atd</filename> init script from
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131 | the <xref linkend="bootscripts"/> package.</para>
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132 |
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133 | <indexterm zone="at at-init">
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134 | <primary sortas="f-at">at</primary>
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135 | </indexterm>
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136 |
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137 | <screen role="root"><userinput>make install-atd</userinput></screen>
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138 |
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139 | </sect3>
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140 |
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141 | </sect2>
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142 |
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143 | <sect2 role="content">
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144 | <title>Contents</title>
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145 |
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146 | <segmentedlist>
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147 | <segtitle>Installed Programs</segtitle>
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148 | <segtitle>Installed Libraries</segtitle>
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149 | <segtitle>Installed Directories</segtitle>
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150 |
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151 | <seglistitem>
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152 | <seg>at, atd, atrun, and batch</seg>
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153 | <seg>None</seg>
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154 | <seg>/var/spool/{atjobs,atspool}</seg>
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155 | </seglistitem>
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156 | </segmentedlist>
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157 |
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158 | <variablelist>
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159 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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160 | <?dbfo list-presentation="list"?>
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161 | <?dbhtml list-presentation="table"?>
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162 |
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163 | <varlistentry id="at-prog">
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164 | <term><command>at</command></term>
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165 | <listitem>
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166 | <para>queues, examines or deletes jobs for later execution.</para>
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167 | <indexterm zone="at at-prog">
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168 | <primary sortas="b-at">at</primary>
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169 | </indexterm>
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170 | </listitem>
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171 | </varlistentry>
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172 |
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173 | <varlistentry id="atd">
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174 | <term><command>atd</command></term>
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175 | <listitem>
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176 | <para>is the daemon that runs jobs queued for later execution.</para>
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177 | <indexterm zone="at atd">
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178 | <primary sortas="b-atd">atd</primary>
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179 | </indexterm>
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180 | </listitem>
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181 | </varlistentry>
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182 |
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183 | <varlistentry id="atrun">
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184 | <term><command>atrun</command></term>
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185 | <listitem>
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186 | <para>runs jobs queued for later execution.</para>
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187 | <indexterm zone="at atrun">
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188 | <primary sortas="b-atrun">atrun</primary>
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189 | </indexterm>
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190 | </listitem>
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191 | </varlistentry>
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192 |
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193 | <varlistentry id="batch">
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194 | <term><command>batch</command></term>
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195 | <listitem>
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196 | <para>is a script that executes commands when system load levels permit.
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197 | </para>
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198 | <indexterm zone="at batch">
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199 | <primary sortas="b-batch">batch</primary>
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200 | </indexterm>
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201 | </listitem>
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202 | </varlistentry>
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203 |
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204 | </variablelist>
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205 |
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206 | </sect2>
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207 |
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208 | </sect1>
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