Highlights lines in a terminal--like an unfiltered grep.

hl.pl [-i] [FILE]*

Reads the contents of (one or more) FILEs and colorizes the matching regexp. Essentially, this is like running a highlighter through your console. When FILE is omitted, colorize STDIN.

This is mostly useful for picking out interesting text from really dense logfiles.

Highlight all lines containing WARN:

Highlight some major event in a particular lifecycle:

Just make a link to hl.pl in your ~/bin directory (wherever that may be), e.g.:

ln hl.pl ~/bin/hl

Also, you may need to install Term::ANSIColor through CPAN. Have fun with that.