Update cheatsheets

linux/setsid

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# setsid
+
+> Run a program in a new session if the calling process is not a process group leader.
+> The created session is by default not controlled by the current terminal.
+> More information: <https://manned.org/setsid>.
+
+- Run a program in a new session:
+
+`setsid {{program}}`
+
+- Run a program in a new session discarding the resulting output and error:
+
+`setsid {{program}} > /dev/null 2>&1`
+
+- Run a program creating a new process:
+
+`setsid --fork {{program}}`
+
+- Return the exit code of a program as the exit code of setsid when the program exits:
+
+`setsid --wait {{program}}`
+
+- Run a program in a new session setting the current terminal as the controlling terminal:
+
+`setsid --ctty {{program}}`