Output files without comments or empty lines

grep -v "^\($\|#\)" <filenames>
Filter comments and empty lines in files. I find this very useful when trying to find what values are actually set in a very long example config file. I often set an alias for it, like : alias nocomment='grep -v "^\($\|#\)"'
Sample Output
$ grep -v "^\($\|#\)" /etc/apt/sources.list
deb http://mc.archive.ubuntu.com/ubuntu/ intrepid main restricted
deb-src http://mc.archive.ubuntu.com/ubuntu/ intrepid main restricted
deb http://mc.archive.ubuntu.com/ubuntu/ intrepid-updates main restricted
deb-src http://mc.archive.ubuntu.com/ubuntu/ intrepid-updates main restricted

2
By: raphink
2009-02-16 21:40:09

1 Alternatives + Submit Alt

What Others Think

sed alternative is: sed '/ *#/d; /^ *$/d' filename
alperyilmaz · 499 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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