Command Help

shridhargrao · December 10, 2011, 04:17

What does this command actually do "grep"Net mass flux" $1 |awk '{print $3}' > timeList.dat" ?

wyldckat · December 12, 2011, 17:09

Greetings Shridhar,

A bit of context would be nice... anyway, that command line is split in two parts:

grep searches for the lines that have "Net mass flux".
The output from grep gets piped through "|" and sent to awk for processing; awk prints out the 3rd value it picks up on each of those lines, if I'm not mistaken.

To learn more about grep and awk:

Code:

man grep
man awk

Searching online for tutorials for each command will also get you more information. I also suggest tutorials about bash, so you can understand the first "$1"

Best regards,
Bruno

December 10, 2011, 04:17	Command Help	#1
shridhargrao New Member Shridhar Join Date: Oct 2011 Posts: 7 Rep Power: 14	What does this command actually do "grep"Net mass flux" $1 \|awk '{print $3}' > timeList.dat" ?

December 12, 2011, 17:09		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,975 Blog Entries: 45 Rep Power: 128	Greetings Shridhar, A bit of context would be nice... anyway, that command line is split in two parts: grep searches for the lines that have "Net mass flux". The output from grep gets piped through "\|" and sent to awk for processing; awk prints out the 3rd value it picks up on each of those lines, if I'm not mistaken. To learn more about grep and awk: Code: man grep man awk Searching online for tutorials for each command will also get you more information. I also suggest tutorials about bash, so you can understand the first "$1" Best regards, Bruno __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM