feat: poweroff commands

.vscode/settings.json

@@ -78,6 +78,7 @@
         "pkexec",
         "polkit",
         "portsnap",
+        "poweroff",
         "pvresize",
         "radeon",
         "replicatedctl",

knowledge base/freebsd.md

@@ -80,6 +80,15 @@ pkg install -y 'zsh' 'zsh-autosuggestions'
 # Check for known vulnerabilities in *installed* applications.
 pkg audit -F
 pkg audit -Fr 'sqlite'
+
+# *Gently* reboot the system.
+shutdown -r now
+shutdown -r +30 "System will reboot"
+
+# *Gently* shutdown the system.
+# `poweroff` is equivalent to `shutdown -p now`.
+shutdown -p +5
+poweroff
 ```
 
 ## Utilities worth noting