x11r4 man page for sleep

SLEEP(1)                                                           User Commands                                                          SLEEP(1)

NAME
       sleep - delay for a specified amount of time

SYNOPSIS
       sleep NUMBER[SUFFIX]...
       sleep OPTION

DESCRIPTION
       Pause for NUMBER seconds.  SUFFIX may be 's' for seconds (the default), 'm' for minutes, 'h' for hours or 'd' for days.  Unlike most imple-
       mentations that require NUMBER be an integer, here NUMBER may be an arbitrary floating point number.  Given two or  more  arguments,  pause
       for the amount of time specified by the sum of their values.

       --help display this help and exit

       --version
              output version information and exit

AUTHOR
       Written by Jim Meyering and Paul Eggert.

REPORTING BUGS
       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report sleep translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       sleep(3)

       Full documentation at: <http://www.gnu.org/software/coreutils/sleep>
       or available locally via: info '(coreutils) sleep invocation'

GNU coreutils 8.28                                                 January 2018                                                           SLEEP(1)