The nohup command, short for no hang-up is used to run a process in the background. A process that has been ‘nohuped’ will continue to run even if the terminal from which it was run is closed. In effect, nohup disconnects the process from the 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 prevents the processes or jobs from receiving the SIGHUP (Signal Hang UP) signal. This is a signal that is sent to a process upon closing or exiting the terminal.

nohup is short for “No Hangups.” It’s not a command that you run by itself. nohup is a supplemental command that tells the Linux system not to stop a command once it has started. It’ll keep running until it’s done, even if the user that started it logs out.

To run a process in the background and ensure it keeps running after you log out, use the nohup command followed by your desired command. The syntax is simple: nohup your_command &. Here’s a simple example: nohup python my_script.py & # Output: # nohup: ignoring input and appending output to 'nohup.out'

The nohup command is a signal masking utility and catches the hangup signal. Where as ampersand doesn’t catch the hang up signals. The shell will terminate the sub command with the hang up signal when running a command using & and exiting the shell. This can be prevented by using nohup, as it catches the signal.