CODEWITHSUNDEEP
linuxbash
faceless
faceless

Reputation: 488

use 'grep' command the way column names would be preserved

I paid attention that 'grep' command removes the column names. I need to customize the output of processes according to the following command:

ps -ef | egrep "java|mysql" | awk {'print $1, $2, $8'}

Regular 'ps' (or even with the 'awk') have column names: UID, PID, etc... However, when i add 'grep' the column names gone. Ideally i must have the 'ps' output that displays 4 columns - PID, user name, CMD, and memory usage. How do i get it preserving the column names.

Upvotes: 1

Views: 3332

Answers (2)

John Goofy
John Goofy

Reputation: 1419

Use the power of bash.

$ cat pid_top.sh
#!/bin/bash

echo "Enter String:"
read p

top -n 1 -b -p $(ps -e | grep $p | awk '{print $1}') | tail -n 2

Don't forget chmod +x pid_top.sh

Make an alias or run the script by name, enter a string, e.g. for firefox just fire an you will have and output like this:

$ ./p*
Enter String:
fire
PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     ZEIT+ BEFEHL
2983 bang      20   0 1605624 600168 108940 S   0,0 15,1  40:28.10 firefox

Upvotes: 0

merlin2011
merlin2011

Reputation: 75629

The grep command will strip the headers because they do not match. Just use awk and match on the first row condition in addition to the search patterns.

ps -ef |  awk 'NR==1{print $1,$2,$8} /java|mysql/{print $1, $2, $8}'

Upvotes: 1

Related Questions