sleep

   Suspends the execution of the current process (or thread in a
   threaded program) for at least the number of seconds indicated by
   its argument.

   Format

     #include  <unistd.h>

     unsigned int sleep  (unsigned seconds); (_DECC_V4_SOURCE)

     int sleep  (unsigned seconds); (not _DECC_V4_SOURCE)
 

Additional information available:

Argument        Description     Return_Values