topic grep for multiple patterns in Operating System - HP-UX

grep for multiple patterns

Rick Garland — Wed, 20 Apr 2005 11:55:30 GMT

Hi all:

Quick question on the use of 'grep'

I have a need to do multiple greps of processes from the command line. Each pattern will be different but I have to check for the occurance of any of these patterns.

I have tried
ps -ef | grep a b c d e
Responds that "grep can't open b c d e"

Would I need to do;
ps -ef | grep a | grep b | grep c | grep d
Or is there a better way?

Thanks!

Re: grep for multiple patterns

RAC_1 — Wed, 20 Apr 2005 11:59:35 GMT

Not completely sure on what you want??

ps -ef | grep 'a b c d e'
ps -ef | egrep "a|b|c|d|e"

Anil

Re: grep for multiple patterns

Geoff Wild — Wed, 20 Apr 2005 12:00:08 GMT

egrep!

ps -ef |egrep -i 'a|b|c|d'

Rgds...Geoff

Re: grep for multiple patterns

Pete Randall — Wed, 20 Apr 2005 12:00:48 GMT

Rick,

I think extended regular expressions (ERE) are what you're looking for:

ps -ef |grep -e "a" -e "b" -e "c" -e "d" -e "e"

Pete

Re: grep for multiple patterns

H.Merijn Brand (procura — Wed, 20 Apr 2005 12:03:43 GMT

# grep -e pat1 -e pat2 -e pat3 file

greps pat1 OR pat2 OR pat3 OR pat5

# grep pat1 file | grep pat2 | grep pat3

greps pat1 AND pat2 AND pat3

# grep -e pat1 -e pat2 file | grep pat3

greps (pat1 OR pat2) AND pat3

# perl -ne'/pat1/||/pat2/||/pat3/and print'

pat1 OR pat2 OR pat3

# perl -ne'(/pat1/||/pat2/)&&/pat3/and print'

(pat1 OR pat2) AND pat3

etc etc ...

Enjoy, Have FUN! H.Merijn

Re: grep for multiple patterns

Rick Garland — Wed, 20 Apr 2005 12:06:51 GMT

Many thanks all!