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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-06-17 10:52:03 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-06-17 10:52:03 +0000
commit932e4432596447eb9331cc2a2bb74a26a35b4efc (patch)
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parentAdding debian version 4.22.0-1. (diff)
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manpages-l10n-932e4432596447eb9331cc2a2bb74a26a35b4efc.zip
Merging upstream version 4.23.0.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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-.TH ANACRON 8 2012-11-22 "cronie" "System Administration"
-.SH NAME
-anacron \- runs commands periodically
-.SH SYNOPSIS
-.B anacron \fR[\fB-s\fR] [\fB-f\fR] [\fB-n\fR] [\fB-d\fR] [\fB-q\fR]
-[\fB-t anacrontab\fR] [\fB-S spooldir\fR] [\fIjob\fR]
-.br
-.B anacron \fR[\fB-S spooldir\fR] -u [\fB-t anacrontab\fR] \fR[\fIjob\fR]
-.br
-.B anacron \fR[\fB-V\fR|\fB-h\fR]
-.br
-.B anacron -T \fR[\fB-t anacrontab\fR]
-.SH DESCRIPTION
-.B Anacron
-is used to execute commands periodically, with a frequency specified in
-days. Unlike
-.BR cron(8) ,
-it does not assume that the machine is running continuously. Hence, it
-can be used on machines that are not running 24 hours a day to control
-regular jobs as daily, weekly, and monthly jobs.
-.PP
-Anacron reads a list of jobs from the
-.I /etc/anacrontab
-configuration file (see
-.BR anacrontab (5)).
-This file contains the list of jobs that Anacron controls. Each job
-entry specifies a period in days, a delay in minutes, a unique job
-identifier, and a shell command.
-.PP
-For each job, Anacron checks whether this job has been executed in the
-last
-.B n
-days, where
-.B n
-is the time period specified for that job. If a job has not been
-executed in
-.B n
-days or more, Anacron runs the job's shell command, after waiting for the
-number of minutes specified as the delay parameter.
-.PP
-After the command exits, Anacron records the date (excludes the hour) in
-a special timestamp file for that job, so it knows when to execute that
-job again.
-.PP
-When there are no more jobs to be run, Anacron exits.
-.PP
-Anacron only considers jobs whose identifier, as specified in
-.BR anacrontab (5),
-matches any of the
-.I job
-command-line arguments. The
-.I job
-command-line arguments can be represented by shell wildcard patterns (be
-sure to protect them from your shell with adequate quoting). Specifying
-no
-.I job
-command-line arguments is equivalent to specifying "*" (that is, all
-jobs are considered by Anacron).
-.PP
-Unless Anacron is run with the
-.B \-d
-option (specified below), it forks to the background when it starts, and
-any parent processes exit immediately.
-.PP
-Unless Anacron is run with the
-.B \-s
-or
-.B \-n
-options, it starts jobs immediately when their delay is over. The
-execution of different jobs is completely independent.
-.PP
-If an executed job generates any output to standard output or to standard
-error, the output is mailed to the user under whom Anacron is running
-(usually root), or to the address specified in the
-.B MAILTO
-environment variable in the
-.I /etc/anacrontab
-file, if such exists. If the
-.B LOGNAME
-environment variable is set, it is used in the From: field of the mail.
-.PP
-Any informative messages generated by Anacron are sent to
-.BR syslogd (8)
-or
-.BR rsyslogd (8)
-under with facility set to
-.B cron
-and priority set to
-.BR notice .
-Any error messages are sent with the priority
-.BR error .
-.PP
-"Active" jobs (i.e., jobs that Anacron already decided to run and are now
-waiting for their delay to pass, and jobs that are currently being
-executed by Anacron), are "locked", so that other copies of Anacron
-cannot run them at the same time.
-.SH OPTIONS
-.TP
-.B \-f
-Forces execution of all jobs, ignoring any timestamps.
-.TP
-.B \-u
-Updates the timestamps of all jobs to the current date, but does not run
-any.
-.TP
-.B \-s
-Serializes execution of jobs. Anacron does not start a new job before the
-previous one finished.
-.TP
-.B \-n
-Runs jobs immediately and ignores the specified delays in the
-.I /etc/anacrontab
-file. This options implies
-.BR -s .
-.TP
-.B \-d
-Does not fork Anacron to the background. In this mode, Anacron will
-output informational messages to standard error, as well as to syslog.
-The output of any job is mailed by Anacron.
-.TP
-.B \-q
-Suppresses any messages to standard error. Only applicable with
-.BR -d .
-.TP
-.B -t some_anacrontab
-Uses the specified anacrontab, rather than the
-.I /etc/anacrontab
-default one.
-.TP
-.B -T
-Anacrontab testing. Tests the
-.I /etc/anacrontab
-configuration file for validity. If there is an error in the file, it is
-shown on the standard output and Anacron returns the value of 1. Valid
-anacrontabs return the value of 0.
-.TP
-.B -S spooldir
-Uses the specified spooldir to store timestamps in. This option is
-required for users who wish to run anacron themselves.
-.TP
-.B -V
-Prints version information, and exits.
-.TP
-.B -h
-Prints short usage message, and exits.
-.SH SIGNALS
-After receiving a
-.B SIGUSR1
-signal, Anacron waits for any running jobs to finish and then exits.
-This can be used to stop Anacron cleanly.
-.SH NOTES
-Make sure your time-zone is set correctly before Anacron is started since
-the time-zone affects the date. This is usually accomplished by setting
-the TZ environment variable, or by installing a
-.I /usr/lib/zoneinfo/localtime
-file. See
-.BR tzset (3)
-for more information.
-.PP
-Timestamp files are created in the spool directory for each job specified
-in an anacrontab. These files are never removed automatically by
-Anacron, and should be removed by hand if a job is no longer being
-scheduled.
-.SH FILES
-.TP
-.I /etc/anacrontab
-Contains specifications of jobs. See
-.BR anacrontab (5)
-for a complete description.
-.TP
-.I /var/spool/anacron
-This directory is used by Anacron for storing timestamp files.
-.SH "SEE ALSO"
-.BR anacrontab (5),
-.BR cron (8),
-.BR tzset (3)
-.PP
-The Anacron
-.I README
-file.
-.SH BUGS
-Anacron never removes timestamp files. Remove unused files manually.
-.PP
-Anacron uses up to two file descriptors for each active job. It may run
-out of descriptors if there are lots of active jobs. See
-.B echo $(($(ulimit -n) / 2))
-for information how many concurrent jobs anacron may run.
-.PP
-Mail comments, suggestions and bug reports to
-.MT shaleh@\:(debian.\:org|\:valinux.\:com)
-Sean 'Shaleh' Perry
-.ME .
-.SH AUTHOR
-Anacron was originally conceived and implemented by
-.MT schwarz@\:monet.\:m.\:isar.\:de
-Christian Schwarz
-.ME .
-.PP
-The current implementation is a complete rewrite by
-.MT itzur@\:actcom.\:co.\:il
-Itai Tzur
-.ME .
-.PP
-The code base was maintained by
-.MT shaleh@\:(debian.\:org|\:valinux.\:com)
-Sean 'Shaleh' Perry
-.ME .
-.PP
-Since 2004, it is maintained by
-.MT pasc@\:(debian.\:org|\:redellipse.\:net)
-Pascal Hakim
-.ME .
-.PP
-For Fedora, Anacron is maintained by
-.MT mmaslano@redhat.\:com
-Marcela Mašláňová
-.ME .