System command
1. Mac shortcut key for displaying hidden file commands: command + shift +.
2. Display the content of the file on the control panel: directly use the cat command for the file in the current directory: cat .ssh, or directly write the full path: cat ~/.ssh
3. Display all folders and file names under the current path: ls
4. Open folder command: open the folder under the current path: open.; Open the specified folder under the current folder: open folderName: open img; open the file under the current file: open filename. suffix
5. Command to create a folder under the current file: mkdir folder name
6. Create a file command in the current folder: touch filename
7. Delete folder command: rm folderName -rf -r means reverse recursion downwards -f means force
8. Delete file command: rm filename -f Note that filename needs to be suffixed, otherwise it cannot be deleted