Periodically run a command without hangups, and send the output to your e-mail

nohup bash -c "while true; do ps -x | mail pascalv@sdf.org; sleep 3600; done" | mail pascalv@sdf.org &
Run "ps -x" (process status) in the background every hour (in this example). The outputs of both "nohup" and "ps -x" are sent to the e-mail (instead of nohup.out and stdout and stderr). If you like it, replace "ps -x" by the command of your choice, replace 3600 (1 hour) by the period of your choice. You can run the command in the loop any time by killing the sleep process. For example ps -x 2925 ? S 0:00.00 sh -c unzip E.zip >/dev/null 2>&1 11288 ? O 0:00.00 unzip E.zip 25428 ? I 0:00.00 sleep 3600 14346 pts/42- I 0:00.01 bash -c while true; do ps -x | mail pascalv; sleep 3600; done 643 pts/66 Ss 0:00.03 -bash 14124 pts/66 O+ 0:00.00 ps -x kill 25428 You have mail in /mail/pascalv
Sample Output
  PID TTY    STAT    TIME COMMAND
  320 pts/2  O+   0:00.00 mail pascalv

1
By: pascalv
2013-08-19 17:21:37

What Others Think

the "cron" (deamon) program was written for running periodic commands. It is very easy to use, recommend reading the manual page for the user command "crontab": man crontab
mpb · 265 weeks and 5 days ago
True, however not all shell providers allow cron jobs. Some allow nohup and one or two background processes, without allowing cron jobs.
pascalv · 265 weeks and 5 days ago
Sure, it's easy to use cron, it's even easier to do with nohup/sleep. cron's a different tool, not intrinsically a better one, unless you have a reason why the command *shouldn't* be used, I see no reason to vote it down.
MadCasual · 265 weeks and 4 days ago
@MadCasual Thanks, appreciate some of us find some utility in this command...
pascalv · 265 weeks and 4 days ago
Great, what I was looking for
pascalv · 263 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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