less – a terminal pager program

less is a terminal pager. A pager is a program that displays text files. Other pagers commonly in use are more and pg. Pagers are often used in command-line environments. less is similar to more, but has the extended capability

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sleepenh – enhanced sleep program

sleepenh is a program that can be used when there is a need to execute some functions periodically in a shell script. It was not designed to be accurate for a single sleep, but to be accurate in a sequence

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