tar command output redirection
i am trying to use the tar command,, i used to use the script i made,, but one time i checked the tape and found some file not backed, i ran the script again and did nothing, just watching the output on screen, i triedto use output redirection but i can't redirect the errors only to a log file, here what i used
tar -cvf tarfile.tar f1 f2 f3 f4 f5 2>tar.log
and i found that the file tar.log holds the same output from both stdout and the stderr,,
do u have any idea about redirecting the errors only to the log file?????
thx in advance.
The given command (tar -cvf tarfile.tar f1 f2 f3 f4 f5 2>tar.log) should work: Errors, if any, to tar.log and normal output to screen.
You are talking about a script, could it be that the script already redirects the output?
Does the tar command work when typed at the prompt?
Not much to go on, but I hope it helps anyway.
i am still having the same result even when i run the command on the prompt?, also i checked the script and found nothing redirecting the stderr to anything,,, i wish to find a solution
Scanning man tar did not give an answer, but here is a GUESS:
The substantive output of tar goes to the specified file---not to "stdout". Thus, the only thing that I would expect to go to stdout would be errors.
What happens if you explicity send stdout to one file, and stderr to another?
Which shell are you using? Could it be that you are using a (t)csh shell? Using bash/ksh the tar command given works, if I try the same with a (t)csh shell it does not work.
If you are using a (t)csh shell try the following:
( tar -cvf tarfile.tar f1 f2 f3 f4 f5 > stdout_file ) > & stderr_file
Hope this helps.
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