Navigating the File System

• 連結
• $ 叫做 shell prompt，會在終端機可以輸入指令時出現

常用指令

• ls 是 list

• pwdstands for "print working directory"

• 印出你現在在哪個資料夾

• cdstands for "change directory"

• e.g. cd jan/memory/

• cd ..

• 跳到上一層

• mkdir media

• 新增一個資料夾 media (directory), 代表 "make directory"

• Creates a new directory in the current working directory.

• touch keyboard.txt

• 新增一個檔案, Creates an empty file in the current working directory.

• In the working directory. You'll see that there is now a new file named keyboard.txt

• The tab key

• What keyboard key helps you autocomplete commands and names?

• The up and down arrow key

• Allow you to cycle through previous commands.

名詞解釋

• argument

• 像 cd 2015

• When a file, directory or program is passed into a command, it is called an argument

. Here the 2015 directory is an argument for the cdcommand.

Filesystem

• Organizing a computer's files and directories into a tree structure:

• The first directory in the filesystem is the root directory

• It is the parent of all other directories and files in the filesystem.

• Each parent directory can contain more child directories and files.

• 像 blog 資料夾就是 parent directory, 下面有 2014資料夾、2015資料夾 和 hardware.txt

• 資料夾都可以再延伸擴展檔案

練習題