wait

wait

 [

ID

]

Pause in execution until all background jobs complete (exit status 0 will be returned), or pause until the specified background process ID or job ID completes (exit status of ID is returned). Note that the shell variable $! contains the process ID of the most recent background process. If job control is not in effect, ID can be only a process ID number. See "Job Control."

Example

wait $!	
Wait for last background process to finish.