Linux nohup Command

• Linux nohup Command
• nohup Command Syntax
• nohup –version
• Starting a process using Nohup
• Starting a process in the background using Nohup

Linux nohup Command

In Linux, we can use “nohup” command that runs the process even after logging out from the shell/terminal.

Nohup, short for no hang up is a command in Linux systems that keep processes running even after exiting the shell or terminal.

nohup Command Syntax

>> nohup command [command-argument ...]

nohup –version

The version of nohup command can be checked by using the following command.

>> nohup --version

Starting a process using Nohup

If you want to keep your processes/jobs running, precede the command with nohup as shown below.

The jobs will still continue running in the shell and will not get killed upon exiting the shell or terminal.

>> nohup ./log_clean_up.sh

Additionally, you can opt to redirect the output to a different file.

>> nohup ./log_clean_up.sh > output.txt

To redirect to a file and to standard error and output use the > filename 2>&1 attribute.

>> nohup ./hello.sh > myoutput.txt >2&1

Starting a process in the background using Nohup

To start a process in the background use the & symbol at the end of the command.

In this example, we are pinging google.com and sending it to the background.

>> nohup ping bing.com &

To run the command in the background , append the & symbol at the end of the command.

If for some reason you want to terminate the process, use the kill command followed by the process ID.

>> kill -9 23142