Update README.md

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Kit Chan 2015-09-20 22:54:58 -07:00
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@ -376,6 +376,10 @@ A few examples of piecing together commands:
- `time`: execute and time a command
- `lockfile`: create semaphore file that can only be removed by `rm -f`
- `logrotate`: rotate, compress and mail logs.
- `watch`: run a command repeatedly, showing results and/or highlighting changes
- `tac`: print files in reverse