The first version of its predecessor, NetInfo, also handled DNS lookups. When they failed, users found they were locked out of everything else. This has improved!
Open Directory
Accessing information about you as a user and a great deal more, using the Advanced Options dialog for user accounts, and Directory Utility.
Changing permissions is straightforward in the Finder or command line. But how would you go about changing a file/folder’s owner or group?
These services don’t often appear in the limelight, but the recent vulnerability in High Sierra reminds us how important they still are.
It is possible for a server administrator to lock themselves out of a Mac server. Here’s how to break back in.
The Eclectic Light Company 