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-   -   How to filter lines (https://www.linuxquestions.org/questions/linux-newbie-8/how-to-filter-lines-716072/)

Nortekman 04-01-2009 10:09 AM
How to filter lines
 
What is the command to filter lines that have a certain "strings" in a file?

druuna 04-01-2009 10:16 AM
Hi,

Filter as in remove or as in show?

grep -v "whatever" infile -> removes all lines that contain whatever

grep "whatever" infile -> show all lines that contain whatever

Hope this helps.

Nortekman 04-01-2009 10:32 AM
Quote:
Originally Posted by druuna (Post 3495014)
Hi,

Filter as in remove or as in show?

grep -v "whatever" infile -> removes all lines that contain whatever

grep "whatever" infile -> show all lines that contain whatever

Hope this helps.
Thanks for your help druuna, that helped a lot!

pixellany 04-01-2009 10:35 AM
Many utilities will do this---not just grep.

I suggest two references:
Bash Guide for Beginners--free at http://tldp.org

Classic Shell Scripting from O'Reilly --Any large bookstore, Amazon, etc.


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