Highlight your logs

  2011-01-20      54 words, 1 minutes

• color
• highlight
• log
• perl

Logs are great. Logs are cool. Logs are helpful. But logs are monochrome.

Unless you ask the camel to colorize them:

# tail -f /var/log/httpd/20110120 |               \
  perl -pe 's/.*b(error)b.*/e[1;31m$&e[0m/g'

You can also do it with Sed. Here’s a Postfix example:

# tail -256f /home/log/luuna/postfix/20110202 |    \
sed -e "s/(NOQUEUE: [a-z]*:)/$DRED1$BLANK/" -e "s/(status=[a-z]* )/$DCYAN1$BLANK/"