How to run a command even after logout
Nohup stands for no hang up.
The syntax is:
nohup /path/to/command-name arg1 arg2 &
- command-name: is name of shell script or command name
- you can pass argument to command or a shell script.
- &: nohup does not automatically put the command in background
- you must do that explicitly, by ending the command line with an & symbol
How to not create nohup.out
nohup /path/to/command-name arg1 arg2 >/dev/null 2>&1 &
- 1 standard output file descriptor
- if you don’t specify a number the output redirection defaults to file descriptor 1 (> is the same as 1>)
- 2 standard error file descriptor
- >& means: “send the file descriptor on the left (2) wherever the file descriptor on the right (1) is going”
- >/dev/null means: “send standard output to /dev/null”
So the sequence >/dev/null 2>&1 means “send standard output to /dev/null and then send standard error to wherever standard output is going” (/dev/null in our case).
“throw away whatever this command writes”