Linux setsid command – run a program in a new session
Linux setsid command is usually used when you need to run scripts in the background. It is not affected by the terminal hangup signal.
syntax
setsid [options] program [arguments]options
- -c, –ctty
Set the controlling terminal to the current one. - -f, –fork
Always create a new process. - -w, –wait
Wait for the execution of the program to end, and return the exit value of this program as the return value of setsid.
Examples & Use Cases
Running jobs (scripts) in the background
Run the ping command using the setsid command and exit the terminal.
➜ ~ setsid ping www.google.com > /dev/null 2>&1 &
[1] 4230
[1] + 4230 done setsid ping www.google.com > /dev/null 2>&1
➜ ~ ps -ef | grep ping | grep -v grep
ylspirit 4233 1 0 06:50 ? 00:00:00 ping www.google.com
➜ ~ exit
Connection to 192.168.159.171 closed.Open a new terminal and use the ps command to see the ping command.
➜ ~ ps -ef | grep ping | grep -v grep
ylspirit 4233 1 0 06:50 ? 00:00:00 ping www.google.com
