A defining difference between macOS and iOS, the command line depends on constancy of file names, and consistency of paths. iCloud breaks both, as well as Finder aliases.
terminal
Illustrated workthrough with Desktop & Documents Folders option turned on, showing file layouts in the GUI and file system. And a new version of Cirrus to do it with.
A detailed look at the presentation of folders and files in the Finder, GUI, Terminal, and FileManager in different iCloud options.
Using files and the macOS clipboard to move content between commands in Terminal and GUI apps.
Changing permissions is straightforward in the Finder or command line. But how would you go about changing a file/folder’s owner or group?
Setting permissions in Terminal is simple. This basic introduction explains how to understand the notation used, and save yourself time fiddling in the Finder.
Do you trust the file size given in Finder’s Get Info dialog? Perhaps you shouldn’t, as it only consider part of the file, its data fork.
Here’s a tool which lets AppleScript and anything else which can run a shell command make an entry in Sierra’s logs.
It can be valuable to know how to restart, run a command, and open an app using Terminal, AppleScript, and different methods in the Finder.
Writing advanced dialog code and building a friendly front-end for a complicated command tool, in AppleScript.
The Eclectic Light Company 