What are the features of nohup in Linux?

In Linux, the nohup command is used to run a command in the background and redirect the output of the command to a file, so that even if the user logs out or closes the terminal, the command will continue to run. The functions of nohup include:

1. Run command in the background: The nohup command can be used to run a command in the background without occupying the terminal.
2. Ignore terminal disconnection: the nohup command allows a command to continue running after the terminal is closed.
3. Output redirection: The nohup command redirects the output of a command to a file, which can be used to record the command’s output information.
4. Prevent commands from being terminated: The nohup command will block termination signals (like SIGHUP) to prevent commands from being unintentionally terminated.
5. Logging: By redirecting output to a file, you can record the running log of commands for easy viewing and analysis.

In general, the main purpose of the nohup command is to run a command in the background, ensure its continuous execution, and save the output information to a file.