wait - is a built-in command of Linux that waits for completing any running process.

syntax $ wait [options] ID

To wait for a background process with PID 7872 $ wait 7872

$ rsync -a /home/Documents /tmp/Documents & [1] 78724

$ wait %1

To make waits for any multiple background job to complete and return the job exit status $ wait -n <pid_1> <pid_2> <pid_3>

wait command in shell scripts $ vim wait.sh #!/bin/bash sleep 20 & process_id=$! echo "PID: $process_id" wait $process_id echo "Exit status: $?" :x

$ sh wait.sh

regards, T.Dhanasekar