i need to make the process (my $cmd = qq{nohup ./perl.pl};) a daemon process. if i remove the &, it remains connected with the shell and i cannot disconnect the script. I have tried to start my script in background and starting process without &. It works but the ppid(20753) is still connected to shell which is closing on the logout. $ ps -ef -o "user,pid,ppid,pgid,args" | grep perl.pl userid 22542 20753 22542 /usr/bin/perl ./perl.pl Is there anyway i can change the ppid of this process to 1 without loggingout for the session.