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RedHat 9 (Linux i386) - man page for batch (redhat section 1)

AT(1)				    Linux Programmer's Manual				    AT(1)

       at, batch, atq, atrm - queue, examine or delete jobs for later execution

       at [-V] [-q queue] [-f file] [-mldbv] TIME
       at -c job [job...]
       atq [-V] [-q queue]
       atrm [-V] job [job...]
       batch [-V] [-q queue] [-f file] [-mv] [TIME]

       at  and	batch  read commands from standard input or a specified file which are to be exe-
       cuted at a later time, using the shell set by the user's environment variable  SHELL,  the
       user's login shell, or ultimately /bin/sh.

       at      executes commands at a specified time.

       atq     lists  the  user's  pending  jobs, unless the user is the superuser; in that case,
	       everybody's jobs are listed.  The format of the output lines (one  for  each  job)
	       is: Job number, date, hour, job class.

       atrm    deletes jobs, identified by their job number.

       batch   executes  commands  when  system load levels permit; in other words, when the load
	       average drops below 0.8, or the value specified in the invocation of atrun.

       At allows fairly complex time specifications, extending the POSIX.2 standard.  It  accepts
       times  of the form HH:MM to run a job at a specific time of day.  (If that time is already
       past, the next day is assumed.)	You may also specify midnight, noon, or teatime (4pm) and
       you  can  have  a  time-of-day  suffixed  with  AM or PM for running in the morning or the
       evening.  You can also say what day the job will be run, by giving  a  date  in	the  form
       month-name  day	with an optional year, or giving a date of the form MMDDYY or MM/DD/YY or
       DD.MM.YY.  The specification of a date must follow the specification of the time  of  day.
       You  can also give times like now + count time-units, where the time-units can be minutes,
       hours, days, or weeks and you can tell at to run the job today by suffixing the time  with
       today and to run the job tomorrow by suffixing the time with tomorrow.

       For example, to run a job at 4pm three days from now, you would do at 4pm + 3 days, to run
       a job at 10:00am on July 31, you would do at 10am Jul 31 and to run a job at 1am tomorrow,
       you would do at 1am tomorrow.

       /usr/share/doc/at-3.1.8/timespec contains the exact definition of the time specification.

       For  both  at  and batch, commands are read from standard input or the file specified with
       the -f option and executed.  The working directory, the environment (except for the  vari-
       ables  TERM, DISPLAY and _) and the umask are retained from the time of invocation.  An at
       - or batch - command invoked from a su(1) shell will retain the current userid.	The  user
       will be mailed standard error and standard output from his commands, if any.  Mail will be
       sent using the command /usr/sbin/sendmail.  If at is executed  from  a  su(1)  shell,  the
       owner of the login shell will receive the mail.

       The  superuser  may use these commands in any case.  For other users, permission to use at
       is determined by the files /etc/at.allow and /etc/at.deny.

       If the file /etc/at.allow exists, only usernames mentioned in it are allowed to use at.

       If /etc/at.allow does not exist, /etc/at.deny is checked, every username not mentioned  in
       it is then allowed to use at.

       If neither exists, only the superuser is allowed use of at.

       An  empty  /etc/at.deny	means  that every user is allowed use these commands, this is the
       default configuration.

       -V      prints the version number to standard error.

       -q queue
	       uses the specified queue.  A queue designation consists of a single letter;  valid
	       queue designations range from a to z.  and A to Z.  The a queue is the default for
	       at and the b queue for batch.  Queues with higher letters run with increased nice-
	       ness.  The special queue "=" is reserved for jobs which are currently running.

       If  a job is submitted to a queue designated with an uppercase letter, it is treated as if
       it had been submitted to batch at that time.  If atq is given a specific  queue,  it  will
       only show jobs pending in that queue.

       -m      Send mail to the user when the job has completed even if there was no output.

       -f file Reads the job from file rather than standard input.

       -l      Is an alias for atq.

       -d      Is an alias for atrm.

       -v      Shows the time the job will be executed.

       Times  displayed  will  be  in the format "1997-02-20 14:50" unless the environment
       variable POSIXLY_CORRECT is set; then, it will be "Thu Feb 20 14:50:00 1996".

       -c     cats the jobs listed on the command line to standard output.


       cron(1), nice(1), sh(1), umask(2), atd(8).

       The correct operation of batch for Linux depends on the presence of  a  proc-  type
       directory mounted on /proc.

       If  the	file  /var/run/utmp  is  not available or corrupted, or if the user is not
       logged on at the time at is invoked, the mail is sent to the userid  found  in  the
       environment variable LOGNAME.  If that is undefined or empty, the current userid is

       At and batch as presently implemented are not suitable when users are competing for
       resources.   If	this is the case for your site, you might want to consider another
       batch system, such as nqs.

       At was mostly written by Thomas Koenig, ig25@rz.uni-karlsruhe.de.

local					     Nov 1996					    AT(1)

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