sleep - is used to delay for a fixed amount of time during the execution of any script

syntax
$ sleep number[suffix]

To make sleep command without any suffix
$ sleep 20s

To display help options
$ sleep --help

$ cat sleep.sh
#!/bin/bash
echo "Waiting for 10 seconds..."
sleep 10
echo "Task Completed"
:x

$ sh sleep.sh
Waiting for 10 seconds...
Task Completed

sleep command in the terminal with other commands
$ ll && sleep 20 && pwd && free -h



regards,
T.Dhanasekar