1. Remove comment lines from configuration files: `grep --invert-match '^\[[:space:]]*#' /etc/file | cat --squeeze-blank`
* There is a more sophisticated version of `cat --squeeze-blank` in the [GNU sed Info documentation](http://www.gnu.org/software/sed/manual/html_node/cat-_002ds.html#cat-_002ds).
1. Remove all blank lines: `sed '/^\[[:space:]]*$/d'`
+1. Bash glob for all directory entries, including hidden: `{.[!.]*,*}`
+* <http://stackoverflow.com/questions/1586477/bash-globbing-autoexpand-for-a-few-specific-cases>
[[!tag Linux Debian "Mac OS X" FreeBSD]]