How to Create an at Job

1. Start the at utility, specifying the time you want your job executed.

   $ at [-m] time [date]

   -m	Sends you email after the job is completed.
   time	Hour that you want to schedule the job. Add am or pm if you do not specify the hours according to a 24-hour clock. Acceptable keywords are midnight, noon, and now. Minutes are optional.
   date	First three or more letters of a month, a day of the week, or the keywords today or tomorrow.

2. At the at prompt, type the commands or scripts you want to execute, one per line.

   You may enter more than one command by pressing Return at the end of each line.

3. Exit the at utility and save the at job by pressing Control-D.

   Your at job is assigned a queue number, which is also the job's file name. This number is displayed when you exit the at utility.

Examples—Creating an at Job

The following example shows the at job that user jones created to remove her backup files at 7:30 p.m. She used the -m option so that she would receive an email message after her job completed.

$ at -m 1930
at> rm /home/jones/*.backup
at> Press Control-D
job 897355800.a at Thu Jul  12 19:30:00 2001

She received a mail message which confirmed the execution of her at job.

Your “at” job “rm /home/jones/*.backup”
completed.

The following example shows how jones scheduled a large at job for 4:00 a.m. Saturday morning. The job output was directed to big.file.

$ at 4 am Saturday
at> sort -r /usr/dict/words > /export/home/jones/big.file