topic grep the string only, not including grep command itself in Operating System - HP-UX

grep the string only, not including grep command itself

Hanry Zhou — Thu, 17 Jul 2003 18:33:30 GMT

When I "grep" a string there is always a additional line for the grep command itself come out. HOw do I have grep only come out one line, in stead of two line?

Ex, ps -ef | grep vhand
two line output:
............vhand
............grep vhand

Re: grep the string only, not including grep command itself

Patrick Wallek — Thu, 17 Jul 2003 18:36:53 GMT

Add a '| grep -v grep' to your command.

# ps -ef | grep vhand | grep -v grep

Re: grep the string only, not including grep command itself

James R. Ferguson — Thu, 17 Jul 2003 18:40:16 GMT

Hi:

# ps -ef|grep vhand|grep -v "grep vhand"

...is your direct answer

Regards!

...JRF...

Re: grep the string only, not including grep command itself

James R. Ferguson — Thu, 17 Jul 2003 18:45:22 GMT

Hi (again):

...however, if you are looking for a process(es) by name, a better way is to leverage the XPG4 (UNIX95) option to select the process by its basename and display the data you want. FOr instance:

# UNIX95= ps -C vhand -o args,pid,ppid,sz,comm

To eliminate the headings from 'ps':

# UNIX95= ps -C vhand -o args,pid,ppid,sz,comm|awk '/NR>1/'

Regards!

...JRF...

Re: grep the string only, not including grep command itself

Steven E. Protter — Thu, 17 Jul 2003 18:48:50 GMT

I have a script called psg which does this automatically, without having to type out the command line options.

I am attaching it. Usage is psg it does reliably eliminate the grep process.

SEP

Re: grep the string only, not including grep command itself

Paul Murray_4 — Thu, 17 Jul 2003 20:10:26 GMT

Hi,

Another alternative to the "| grep -v grep" extension is to enclose the first character of your grep string inside [] - basically, this turns the command into a regular expression.

For example:-

$ ps -ef | grep vhand | grep -v grep

can also be written as:-

$ ps -ef | grep [v]hand

This is a quick and easy alternative when entering the command interactively, but the "| grep -v grep" is far easier to use within shell scripts, especially if the grep string is a substituted variable.

Rgds,
Paul.

Re: grep the string only, not including grep command itself

Caesar_3 — Thu, 17 Jul 2003 20:31:57 GMT

Hello!

Do:
ps -ef |grep -v grep | grep vhand

Caesar

Re: grep the string only, not including grep command itself

Kevin Wright — Thu, 17 Jul 2003 21:20:48 GMT

ps -ef |grep [v]hand