can't capture 'at' command standard output to a file

bartoni · 02-28-2006, 07:34 AM

Hello all,

I'm lost and hope someone with a clue can help me out.

If I do :

Code:

ls > test.txt

test.txt will contain the results from the command ls, no probs.

similary if I do :

Code:

at -l > test.txt

to see a list of scheduled jobs, test.txt contains the results as expected.

But... and here's my problem, if I do :

Code:

at -m -f myscript.sh now > test.txt

(to schedule my script) the output to the screen is :

Code:

warning: commands will be executed using /bin/sh
job 641 at 2006-02-28 13:35

But test.txt is empty!

How can I capture the output from the latter AT command, could the warning message be the reason that it is not sent to the file?

Hope someone can help, I'm really stuck with this.

Thanks.

bathory · 02-28-2006, 08:47 AM

This should work:

Code:

at -m -f myscript.sh now > test.txt  2>&1

bartoni · 02-28-2006, 10:34 AM

Thanks! It works great.

Can you explain how?

bathory · 02-28-2006, 03:52 PM

All that this command does is to redirect stdout (file decriptor 1) and stderr (file descriptor 2) to the file specified (test.txt). That means that all the output the command produces (normal output and eventual errors) is written to that file. For more info:

Code:

man bash