Question

I think I am missing something terribly stupid, please correct me.

root@fdas:~# mount /dev/sdd1 /b 2>&1 > /tmp/test

mount: you must specify the filesystem type
root@fdas:~# cat /tmp/test 
root@fdas:~# mount /dev/sdd1 /b > test
mount: you must specify the filesystem type
root@fdas:~# cat test 
root@fdas:~# 

I simply need to capture that one line of output…Thank you in advance

Answer 1

It appears that in standard shell (not bash/csh) you need to tell it where to redirect stdout first and redirect stderr then, so you just need to swap your redirects:

mount /dev/sdd1 /b > /tmp/test 2>&1

In CSH you can use & as Shiplu suggested:

mount /dev/sdd1 /b >&  /tmp/test

In BASH & syntax is different:

mount /dev/sdd1 /b &>  /tmp/test

BASH supports CSH & syntax too, but it is NOT recommended (in man)