There are many occasions when I am configuring new software on Linux and the configuration files are full of comments. While these have admittedly useful information what I want is to quickly view only the configuration that is currently set. Then I can see what I need to change or add in the file.
The solution is to use grep with regular expression ^[^#] which matches the first character of any line when that character is not equal to #. Lines without characters do no match so are also not displayed.
$ grep ^[^#] <path to file>
Example
$ grep ^[^#] /etc/resolv.conf
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