change directories
$ cd directory_name
make a directory
$ mkdir directory_name
go up one directory
$ cd ..
make a file
$ touch file_name
delete a file
$ rm filename
delete a directory
$ rm -r directory_name
rename or move a file or folder
$ mv old_file_name new_file_name
copy a file or folder
$ cp old_file_name new_file_name
open the current directory in the Finder
$ open .
open the current directory in the vscode
$ code .