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AT(1) General Commands Manual AT(1) NAME at - execute commands at a later time SYNOPSIS at [ -r ] time [ day ] [ file ] at -l DESCRIPTION At squirrels away a copy of the named file (standard input default) to be used as input to sh(1) at a specified later time. A cd command to the current directory is inserted at the beginning, followed by assign- ments to all environment variables. When the script is run, it uses the userid and groupid of the creator of the copy. The time is 1 to 4 digits, with an optional following or for AM, PM, noon or midnight. One and two digit numbers are taken to be hours, three and four digits to be hours and minutes. If no letters follow the digits, a 24 hour clock time is understood. The optional day is either a month name followed by a day number, or a day of the week; if the word follows, invocation is moved seven days further off. Names of months and days may be recognizably truncated. A year number, spelled out in full, may follow the month. The options are -r Remove the specified activity. -l List all activities scheduled for this user. At programs are executed by periodic execution of from cron(8). The granularity of at depends upon how often atrun is executed. The standard output and standard error files are lost unless redi- rected. EXAMPLES at 0800 dec 24 echo ho ho ho | mail claus at -r `at -l` Remove a scheduled activity. FILES /usr/spool/at/yy.ddd.hhmm.* activity for year, day, hour last hhmm activities in progress SEE ALSO calendar(1), pwd(1), sleep(1), cron(8) BUGS Due to the granularity of the execution of atrun, there may be bugs in scheduling things almost exactly 24 hours into the future. AT(1)