command-line-interfacedaemonlinuxnohup
I've got a command (program) that I'd like to run with nohup and background it. Like
nohup command > logfile.txt &
How do I find out the process ID? I would like to be able to write the process id in a file, read it later and kill the process programatically.
Answer found.
For BASH, this depends on the huponexit shell option, which can be viewed and/or set using the built-in shopt command.
Looks like this options is off by default, at least on RedHat-based systems.
More info on the BASH man page:
The shell exits by default upon receipt of a SIGHUP. Before exiting, an interactive shell resends the SIGHUP to all jobs, running or stopped. Stopped jobs are sent SIGCONT to ensure that they receive the SIGHUP. To prevent the shell from sending the signal to a particular job, it should be removed from the jobs table with the disown builtin (see SHELL BUILTIN COMMANDS below) or marked to not receive SIGHUP using disown -h.
If the huponexit shell option has been set with shopt, bash sends a SIGHUP to all jobs when an interactive login shell exits.
Best Answer
In your script: