setsid — run a program in a new session


setsid [options] program [arguments]


setsid runs a program in a new session. The command calls fork(2) if already a process group leader.  Otherwise, it executes a program in the current process.  This default behavior is possible to override by the --fork option.


-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.

-V, --version

Display version information and exit.

-h, --help

Display help text and exit.

See Also



Rick Sladkey <>


The setsid command is part of the util-linux package and is available from

Referenced By

setsid(2), socat(1).

July 2014 util-linux