`sleep': Delay for a specified time
===================================
`sleep' pauses for an amount of time specified by the sum of the
values of the command line arguments. Synopsis:
sleep NUMBER[smhd]...
Each argument is a number followed by an optional unit; the default
is seconds. The units are:
`s'
seconds
`m'
minutes
`h'
hours
`d'
days
Historical implementations of `sleep' have required that NUMBER be
an integer. However, GNU `sleep' accepts arbitrary floating point
numbers.
The only options are `--help' and `--version'. Note:Common
options.