Redirect output eg 2>&1

[vodkadrinker]

Can anyone point me in the right direction as to what each number stands for in a redirect.

2 = standard errors etc..

What I want to do is send the errors to a logfile and to the screen at the same time.

Example line
umount /datafilesystem > /tmp/logfile 2>&1

This will send the output to the file but not to the screen.

Thanks
VD

 

[vgersh99]

man tee vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[vodkadrinker]

Thanks vlad

Just incase anyone else needs to know the command looks like this.

umount /datafilesystem 2>&1|tee -a /tmp/logfile

This will send both standard output and errors to both the screen and the log file.

0=stdin
1=stdout
2=stderr

VD