SSH - disown
Introduction
disown, removes the job from the process job list of the system,
so the process is shielded from being killed during session disconnection as
it won’t receive SIGHUP by the shell when you logout.
Disadvantage:
Used only for the jobs that do not need any input from the stdin and neither need to write to stdout
try to interact with stdin or stdout, it will halt
Usage
1. run a program to background
ping www.ami.com -4 1>/dev/null 2>&1 &
Response PID:
[1] 48069
2. list running jobs:
jobs -l
[1]+ 48069 Running ping www.ami.com -4 > /dev/null 2>&1 &
3. removes the job from the process job list of the system: pass disown signal to job
disown -h %1
4. exit ssh and re-login remote server
exit
# reconnect
ssh name@hostname
5. check the jobs list, the previous job is still running:
ps -ef | grep ping
jun 48069 8998 0 21:11 pts/6 00:00:00 ping www.ami.com -4
jun 48071 8998 0 21:11 pts/6 00:00:00 grep --color=auto ping