linux nohup command – run a command immune to hangups, with output to a non-tty
When the linux nohup command is used to run jobs (scripts) in the background, it can ignore the hangup signal and cooperate with output redirection to achieve long-term jobs (scripts) run in the background.
Plays a very important role in daily development.
nohup COMMAND [ARG]...
display help and exit
output version information and exit
Examples & Use Cases
Run script in background
1.In terminal window 1, run the script in the background using the linux nohup command and then close this terminal window.
➜ nohup ./test.sh > /dev/null 2>&1 &
2.Open a new terminal window 2 and use the linux ps command to query the script process.
➜ ~ ps -ef | grep "test.sh" | grep -v grep
ylspirit 7799 1 0 17:09 ? 00:00:00 /bin/bash ./test.sh
- 2> &1:
Redirects standard error to standard output. Here our standard output has been redirected to the /dev/null empty device, so standard error is also output to /dev/null.
- & :
To let the command execute in the background.