> (right angle bracket) operator redirects the standard output of a
process to a file.
It doesn't affect the standard error.
If you're logged in and can see any messages written to standard error,
nroff -ms report.ms > report.out & 10316 ...Later... nroff: can't open file /hoem/jpeek/report.data
But if you log out and leave the job running, you'll never see those errors
unless you use the csh operator
It redirects both standard output and standard error to a file.
You might also use the
>& operator while you're logged in - and watch
the output file with
tail -f (25.16).
If you don't want the errors mixed with other output, you can split them
to two files; see article
The C shell also has a pipe operator,
|&, that redirects both
standard output and standard error.
It's great for running a job in the background, or on another computer,
any output to me:
make |& mailx -s "'make bigprog' output" firstname.lastname@example.org & 29182 29183
If I'd used plain
| instead of
|&, any text on the standard
error wouldn't go into the mail message.