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Top Forums UNIX for Dummies Questions & Answers How to use 'nohup' and 'at' commands collectively? Post 302511758 by Corona688 on Thursday 7th of April 2011 01:12:56 PM
Old 04-07-2011
A few things.
  1. By putting it in backticks, you're running this 'test1' command immediately.
  2. -f doesn't take parameters and doesn't take commands. It takes a bourne script file and nothing but a bourne script file.
  3. nohup is redundant here, running something by at instead is at least as good as it by itself. 'at' doesn't stick around. The command just hands off your request to the at daemon then quits. the at daemon itself will run the command later, quite independent of your own session.
  4. Without the full path, it may have no idea where test1 is. It may not have the full PATH you're used to so specify an absolute path.

Fortunately you can avoid having to create a script file to feed it a command in. Try:

Code:
echo '/path/to/test1 -a -b -c' | at 2am 08 april

It's usually not a good idea to name scripts 'test'. There's already a 'test' command that you don't want it confused with.

Last edited by Corona688; 04-07-2011 at 02:19 PM..
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NICE(1) 						      General Commands Manual							   NICE(1)

NAME
nice, nohup - run a command at low priority (sh only) SYNOPSIS
nice [ -number ] command [ arguments ] nohup command [ arguments ] DESCRIPTION
Nice executes command with low scheduling priority. If the number argument is present, the priority is incremented (higher numbers mean lower priorities) by that amount up to a limit of 20. The default number is 10. The super-user may run commands with priority higher than normal by using a negative priority, e.g. `--10'. Nohup executes command immune to hangup and terminate signals from the controlling terminal. The priority is incremented by 5. Nohup should be invoked from the shell with `&' in order to prevent it from responding to interrupts by or stealing the input from the next per- son who logs in on the same terminal. FILES
nohup.out standard output and standard error file under nohup SEE ALSO
csh(1), setpriority(2), renice(8) DIAGNOSTICS
Nice returns the exit status of the subject command. BUGS
Nice and nohup are particular to sh(1). If you use csh(1), then commands executed with ``&'' are automatically immune to hangup signals while in the background. There is a builtin command nohup which provides immunity from terminate, but it does not redirect output to nohup.out. Nice is built into csh(1) with a slightly different syntax than described here. The form ``nice +10'' nices to positive nice, and ``nice -10'' can be used by the super-user to give a process more of the processor. 4th Berkeley Distribution May 8, 1986 NICE(1)
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