Removing Comments and Blank lines of a config file
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