There are many useful features of macOS that must be accessed by using commands in the Terminal app. These can include anything from fixing file permissions to LDAP binding settings. Luckily there is documentation about each one of these commands and how to use them, the man (manual) pages. Man pages are sets of instructions and examples of these Terminal commands you can use in macOS. Man Pages from Apple’s Developer site contains HTML versions of the OS X, OS X Server, Xcode Tools, and CHUD man pages.
Click the link below to access Apple’s reference for the macOS man pages. While these can also be accessed directly in the Terminal app, using the man command, it may be useful to simply reference these as you dive deeper into CLI.
For info how to read and use the man pages, check out this article from MacWorld.
The key to Terminal wisdom is the
mancommand. It summons manual (or man) pages for almost any command; they’re the equivalent of a help system for the command line. In fact,
manitself is a command, whose role is to format and display this documentation.