at
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| ====== at (linux) ====== | ====== at (linux) ====== | ||
| - | In Unix-like computer operating systems, the at command is used to schedule commands to be executed once, at a particular time in the future. | + | In Unix-like computer operating systems, the at command is used to schedule commands to be executed once, \\ |
| + | at a particular time in the future. | ||
| - | More precisely, it reads a series of commands from standard input and collects them into one " | + | More precisely, it reads a series of commands from standard input and collects them into one " |
| + | is carried out at a later date. The at-job inherits the current environment, | ||
| + | same working directory and with the same environment variables set as when it was scheduled. | ||
| - | It differs from cron which is used for recurring executions (e.g. once an hour, every Tuesday, January 1 every year). As with cron, many Unix systems allow the administrator to restrict access to the at command. | + | It differs from cron which is used for recurring executions (e.g. once an hour, every Tuesday, January 1 every year). |
| + | As with cron, many Unix systems allow the administrator to restrict access to the at command. | ||
| - | at can be made to mail a user when done carrying out a scheduled job of theirs, can use more than one job queue, and can read a list of jobs to carry out from a file instead of standard input. A sample command to compile a C program at 11:45 a. m. on January 31st and e-mail the results (STDOUT and STDERR) to your user ID would be: | + | at can be made to mail a user when done carrying out a scheduled job of theirs, can use more than one job queue, |
| + | and can read a list of jobs to carry out from a file instead of standard input. | ||
| + | A sample command to compile a C program at 11:45 a. m. on January 31st and e-mail the results (STDOUT and STDERR) to your user ID would be: | ||
| <code bash> | <code bash> | ||
at.1332531917.txt.gz · Last modified: 2020/08/10 02:28 (external edit)