remark Command: Highlight Any Text or Command Output Using Regular Expressions

The remark command is a little know tool that can be used to color syslog file as well as output of of programs such as ping, traceroute, and much more.

You can highlight text using regular expressions and specific rule formats. The hierarchical rules-format is simple to understand, yet very powerful. The remark will read each line from stdin and each line is highlighted according to rules defined in FILE, and is then printed to stdout (screen).