HowTo Keep Processes Running After Logging Out Using: "setsid"
HowTo Set Session ID (SID) and Process Group ID (PGID)
The "setsid" command allows one to set a new "Session ID" (SID) and "Process Group ID" (PGID) for a given command. This can be useful when logging out from a shell environment and keeping a process running. Since the process is running in an entirely different "session", it should not be effected by the logging out and terminating the shell.