Let's colorized those logs!
A nifty tool called
ccze can be used to lighten up those log files you tail all day..
FreeBSD pkg install ccze
Debian apt install ccze
Now just use it with the built-in log viewer..
FreeBSD
$ tail -F /var/log/daemon.log /var/log/auth.log /var/log/messages | ccze -A -o nolookups
Debian
$ journalctl -fen 15 | ccze -A -o nolookups
Happy monitoring :>