Simple Bash Script

dmedici · 12-27-2004, 07:53 PM

Hi all!

Trying to write a very simple Bash script as I learn how to work in Bash...

One line needs me to:

"display any results from the who command about the current user only"

Can someone tell me how to do this?

Many thanks in advance!

kilgoretrout · 12-27-2004, 08:12 PM

$ who | grep [whoami]

dmedici · 12-27-2004, 09:10 PM

Thank you for the very fast reply! It worked when I logged in as root, but then I went to another shell, logged in as TEST, and unfortunately it didn't work there, although typing in WHO as TEST gave me results. Any other possibilities for that line?

kilgoretrout · 12-28-2004, 12:16 AM

Try this:

$ who | grep `whoami`

those are backward single quotes around whoami which is on the same key as the ~ key.

dmedici · 12-29-2004, 05:33 PM

OK, that fix with the tic marks worked! Again, thank you very much! Very fast response!

dmedici · 12-29-2004, 07:00 PM

One more question if I may - I need to do the same thing I did with the WHO command but with the ps command. I tried adding that line below the who | grep `whoami` with ps substituted for who but it didn't take. Any ideas?

kilgoretrout · 12-30-2004, 02:46 AM

Try:

$ ps -ef | grep `whoami`

See man ps. The "ef" switch is necessary to get the user name associated with the process and grep can work from that output.

bigearsbilly · 12-30-2004, 04:24 AM

how about ?

Code:

ps -u username

billy

dmedici · 12-30-2004, 07:55 PM

Thanks to both of you for the quick replies - both solutions work but in slightly different ways - Kilgore's has slightly more info in the output than billy's, but they are both pretty much what I was looking for. Great job! Really helped me a lot!

D

bigearsbilly · 12-31-2004, 03:48 AM

if you read the man page for ps
you'll see you can tailor the output
to exactly the fields you want
using an option string.

regards, billy