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Shell Script

Remove blank line using Grep and sed

December 8, 2017 Leave a Comment

scmuser created the topic: Remove blank line using Grep and sed
Hi,

How do you remove blank line using grep and sed in shell scripting?

rajeshkumar replied the topic: Re: Remove blank line using Grep and sed

grep -v "^$" filename > newfilename

The ^$ within the quotes is a regular expression: ^=beginning of line, $=end of line, with no characters between.

To store output to another file use redirection operator:

$ sed ‘/^$/d’ /tmp/data.txt > /tmp/output.txt

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

rajeshkumar replied the topic: Re: Remove blank line using Grep and sed
The above script will work only if you have no character in the blank line but most of the time it can happen that Tab can be possle in blank line….

so for this situation u should try following..

sed '/^[PRESS TAB]*$/d' filename

Regards,
Rajesh Kumar
Twitt me @ twitter.com/RajeshKumarIn

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