nohup Linux Command

Table of Contents

nohup Linux command

In this tutorial, we will learn the nohup Linux Command. nohup stands for no hang-up signals. We use this command to run servers in the background ( & ) and continue to run even after exiting the Terminal or Konsole.

Command Syntax

We use this nohup to run a command and ignore hang-up signals. We are making the command that we run immune to hang-up signals. Additionally, we can redirect or append the output to the ‘nohup.out’ file.

To know the help documentation, type the help command switch or the man page for the command.

$ nohup –help

To see the man page, type:

$ man nohup

nohup linux command

Examples

# Starting Application Server

Let’s see an example usage of the command. We will use the nohup command to start the JBoss application server and redirect the output to the nohup.out file.

$ nohup ./standalone.sh & > nohup.out

Explanation

In the nohup command, the & symbol is used to run the command in the background. nohup (no hang-up) allows a command to continue running even if the user logs out or the terminal is closed. Adding a symbol & at the end of the nohup command sends the command to the background, freeing up the terminal for other tasks.

standalone.sh is the JBoss standalone server startup script to start the server in standalone mode. & will make the application server process run in the background. nohup will make the server immune to signals.

You can continue to use the terminal. You can also notice that the server continues to run even if you exit the Terminal or even if you log out from the system.

The output is typically redirected to a file called nohup.out unless specified otherwise.

nohup JBOSS server start