What is the usage of the nohup command in Linux?

In Linux, the nohup command is used to run a command in the background, allowing it to continue executing even if the terminal window is closed or the user logs out.

The usage of the nohup command is as follows:

nohup COMMAND [ARG]...

COMMAND is the command that needs to be run in the background, while ARG is the argument of the command.

When using the nohup command, the output of the command will be redirected to a file named nohup.out. If a nohup.out file already exists in the current directory, the output of the command will be appended to that file.

For example, to run a shell script named my_script.sh in the background, you can use the following command:

nohup ./my_script.sh &

This will run the my_script.sh script in the background and redirect the output to the nohup.out file.

When using the nohup command, keep in mind that the output may be buffered and not immediately displayed in the nohup.out file. To view the output in real-time, you can use the command tail -f nohup.out.