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Verify and Repair Disk Permissions via Terminal (Mac OS X)

Verify Permissions

diskutil verifyPermissions /

Repair Permissions

diskutil repairPermissions /

If you don't like or need the kdc process on Mac OS X, which opens TCP port 88 to the world, you can disable it with launchctl.

Disable:

sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.Kerberos.kdc.plist

Enable:

sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.Kerberos.kdc.plist

	find /System/Library/LaunchDaemons /System/Library/LaunchAgents -name "*.plist" \
	\| while read p ; do plutil -convert json -o - ${p} \
	\| jq -r ' .. \| objects \| with_entries(select(.key == "Notification")) \| select(. != {}).Notification'
	done \| sort -u > ~/Desktop/all-launchd-notifications.txt