Colorizes an access log

function colorize() { c="--line-buffered --color=yes"; GREP_COLORS="mt=01;34" egrep $c '(^| 200 | 304 )' "${@}" | GREP_COLORS="mt=02;31" egrep $c '(^|"(GET|POST) .*[^0-9] 4[0-1][0-9] )' | GREP_COLORS="ms=02;37" egrep $c '(^|^[0-9\.]+) ';}
Puts a splash of color in your access logs. IP addresses are gray, 200 and 304 are green, all 4xx errors are red. Works well with e.g. "colorize access_log | less -R" if you want to see your colors while paging. Use as inspiration for other things you might be tailing, like syslog or vmstat Usage: tail -f access.log | colorize

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