Update cheatsheets

linux/i3exit

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# i3exit
+
+> Exit the i3 window manager.
+> More information: <https://gitlab.manjaro.org/packages/community/i3/i3exit>.
+
+- Log out of i3:
+
+`i3exit logout`
+
+- Lock i3:
+
+`i3exit lock`
+
+- Shut down the system:
+
+`i3exit shutdown`
+
+- Suspend the system:
+
+`i3exit suspend`
+
+- Switch to the login screen to log in as a different user:
+
+`i3exit switch_user`
+
+- Hibernate the system:
+
+`i3exit hibernate`
+
+- Reboot the system:
+
+`i3exit reboot`