watchng
About
watchng is a program that runs the given command-line periodically, showing the output only when it is different than the last, along with the time.
Usage
watchng --help
watchng [--period=<n>] [--shell] <command...>
Options
-h, --help Help.
-p, --period seconds Set the interval between command executions
-c, --shell Run command through shell - as $SHELL -c <command...>