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Use it with cat and '|' for know what is used in a conf file.
For example cat /etc/squid/squid.conf | sed -re '/^#/d ; s/#.*$// ; /^\s$/d' :
Show you what you use in your file conf.
It removes all comments and empty lines.
Empty lines are lines with nothing, a tab, or a space.
There is 1 alternative - vote for the best!
Removes comments and blank lines from configuration files, leaving only settings
If you can do better, submit your command here.
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