info

key points:

• The file system is responsible for managing information on the disk.
• Information is stored in files, which are stored in directories (folders).
• Directories can also store other directories, which then form a directory tree.
• cd [path] changes the current working directory.
• ls [path] prints a listing of a specific file or directory; ls on its own lists the current working directory.
• pwd prints the user’s current working directory.
• / on its own is the root directory of the whole file system.
• Most commands take options (flags) that begin with a -.
• A relative path specifies a location starting from the current location.
• An absolute path specifies a location from the root of the file system.
• Directory names in a path are separated with / on Unix, but \\ on Windows.
• .. means ’the directory above the current one’; . on its own means ’the current directory'.