Linux Sleep Command Explained (with Examples)

1. What does the sleep command do in Linux?
2. How do you use sleep command?
3. How do you make a process sleep in Linux?
4. How do you sleep in a shell script?
5. How do you kill a command in Linux?
6. How do I run a shell script?
7. How do I wait in bash?
8. How do I list all processes?
9. What is wait command in Linux?
10. Who command in Linux?
11. How do I put Linux to sleep from command line?
12. What is Ctrl Z in Linux?

What does the sleep command do in Linux?

sleep command is used to create a dummy job. A dummy job helps in delaying the execution. It takes time in seconds by default but a small suffix(s, m, h, d) can be added at the end to convert it into any other format. This command pauses the execution for an amount of time which is defined by NUMBER.

How do you use sleep command?

Sleep command is used to delay for a fixed amount of time during the execution of any script. When the coder needs to pause the execution of any command for the particular purpose then this command is used with the particular time value. You can set the delay amount by seconds (s), minutes (m), hours (h) and days (d).

How do you make a process sleep in Linux?

First, find the pid of the running process using ps command. Then, pause it using kill -STOP <PID>, and then hibernate your system. Resume your system and resume the stopped process using command kill -CONT <PID>.

How do you sleep in a shell script?

On the command line type sleep , a space, a number, and then press Enter. The cursor will disappear for five seconds and then return. What happened? Using sleep on the command line instructs Bash to suspend processing for the duration you provided.

How do you kill a command in Linux?

The syntax of the kill command takes the following form: kill [OPTIONS] [PID]... The kill command sends a signal to specified processes or process groups, causing them to act according to the signal.
...
kill Command

1. 1 ( HUP ) - Reload a process.
2. 9 ( KILL ) - Kill a process.
3. 15 ( TERM ) - Gracefully stop a process.

How do I run a shell script?

Steps to write and execute a script

1. Open the terminal. Go to the directory where you want to create your script.
2. Create a file with . sh extension.
3. Write the script in the file using an editor.
4. Make the script executable with command chmod +x <fileName>.
5. Run the script using ./<fileName>.

How do I wait in bash?

wait is typically used in shell scripts that spawn child processes that execute in parallel. To illustrate how the command works, create the following script: #!/bin/bash sleep 30 & process_id=$! echo "PID: $process_id" wait $process_id echo "Exit status: $?"

How do I list all processes?

The most common way to list processes currently running on your system is to use the command ps (short for process status). This command has a lot of options that come in handy when troubleshooting your system. The most used options with ps are a, u and x.

What is wait command in Linux?

wait is a built-in command of Linux that waits for completing any running process. wait command is used with a particular process id or job id. ... If no process id or job id is given with wait command then it will wait for all current child processes to complete and returns exit status.

Who command in Linux?

The standard Unix command who displays a list of users who are currently logged into the computer. The who command is related to the command w , which provides the same information but also displays additional data and statistics.

How do I put Linux to sleep from command line?

You can use the following commands under Linux to suspend or Hibernate Linux system:

1. systemctl suspend Command – Use systemd to suspend/hibernate from command line on Linux.
2. pm-suspend Command – During suspend most devices are shutdown, and system state is saved in RAM.

What is Ctrl Z in Linux?

Again, some of you may be used to Ctrl+z as the shortcut to undo, but in the Linux shell, Ctrl+z sends the SIGTSTP (Signal Tty SToP) signal to the foreground job. When you press this key combination, the running program will be stopped and you will be returned to the command prompt.