What is grep?

Thaidog · 07-23-2003, 11:46 PM

I just got through with a job interveiw that has a lot of unix to it... one of the things that came up was the command grep...

They were doing something on te command line like: ... | grep....

Anyone?

ksgill · 07-23-2003, 11:52 PM

http://www.computerhope.com/unix/ugrep.htm#01

slakmagik · 07-23-2003, 11:56 PM

Y'know you can literally type 'whatis grep' into a prompt and get an answer?

Code:

|--digiot@slackath Wed Jul 23 20:56:10
|--bash 2.05b ~ $ whatis grep
grep                 (1)  - print lines matching a pattern

DrOzz · 07-23-2003, 11:57 PM

did you look at the man page?
man grep
so for example if i wanna use grep to search through my rpm database to see if i have xine installed i can use:
rpm -qa |grep xine
and this will only output from my whole rpm database any words that contain xine.
so my results are:
xine-0.9.20-fr1
xine-skins-1.5-fr1
xine-lib-1.0.0-fr0.beta9.1
if i would just type a simple rpm -qa i would get a huge list of everything and instead of searching through that list manually, i let grep do the work

DrOzz · 07-23-2003, 11:58 PM

man i'm slow hehe, there was no responses when i started typing

Thaidog · 07-24-2003, 12:02 AM

Quote:

Originally posted by digiot
Y'know you can literally type 'whatis grep' into a prompt and get an answer?

Code:

|--digiot@slackath Wed Jul 23 20:56:10 |--bash 2.05b ~ $ whatis grep grep (1) - print lines matching a pattern

I'm at work on my Windows box dogg.... no go for now

slakmagik · 07-24-2003, 12:07 AM

Well, install Cygwin!

ksgill · 07-24-2003, 12:09 AM

if you are on windows box read the second post

Thaidog · 07-24-2003, 02:04 AM

Quote:

Originally posted by Jatt_thugz
if you are on windows box read the second post

perfect! thx man