Removing Comments and Blank lines of a config file: Difference between revisions
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Using 'grep' and 'sed' we can strip out comments and blank lines of any file. you can then redirect the output to a file if you so wish. In this example I will use it to remove the comments and blank lines from my apache2.conf file | Using 'grep' and 'sed' we can strip out comments and blank lines of any file. you can then redirect the output to a file if you so wish. In this example I will use it to remove the comments and blank lines from my apache2.conf file | ||
<syntaxhighlight lang="bash"> | |||
grep -v "#" /etc/apache2/apache2.conf | sed -e '/^$/d' | |||
</syntaxhighlight> | |||
If you wish to leave the blank lines then simply omit the sed statement. | If you wish to leave the blank lines then simply omit the sed statement. | ||
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Alternatively you can use egrep | Alternatively you can use egrep | ||
<syntaxhighlight lang="bash"> | |||
egrep -v '(#|^\s*$)' | |||
</syntaxhighlight> | |||
With both options you can of course redirect output to a new file. The default is stdout | With both options you can of course redirect output to a new file. The default is stdout | ||
[[Category:Linux| ]] [[Category:Unix| ]] | [[Category:Linux| ]] [[Category:Unix| ]] | ||
Revision as of 10:59, 27 February 2017
Remove blank lines and comments from a config file
Using 'grep' and 'sed' we can strip out comments and blank lines of any file. you can then redirect the output to a file if you so wish. In this example I will use it to remove the comments and blank lines from my apache2.conf file
grep -v "#" /etc/apache2/apache2.conf | sed -e '/^$/d'
If you wish to leave the blank lines then simply omit the sed statement.
Alternatively you can use egrep
egrep -v '(#|^\s*$)'
With both options you can of course redirect output to a new file. The default is stdout