Leave com­mand

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The leave com­mand can be used as a sim­ple re­minder. It ac­cepts time in the hh-mm for­mat, where is in hours and is in min­utes, in the 12-hour for­mat, what­ever be the time given. It keeps dis­play­ing a mes­sage in the ter­mi­nal from which the com­mand was given. The re­minder is given 5 min­utes be­fore the ac­tual time, 1 minute be­fore the time, at the time men­tioned in the com­mand and ev­ery minute af­ter that, un­til the user logs out. It prompts users to fill in the time if no ar­gu­ment is given as part of the com­mand. To re­mind you to leave at 5 pm, you have to give the fol­low­ing com­mand:

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