CLI (Command Line Interface) 1

http://swcarpentry.github.io/shell-novice

내용정리

Navigating Files and Directories

$ (% in Mac)

Shell is waiting for input.

$ ls

Listing → Lists the contents of the current directory.

$ pwd

Print Working Directory → Shows current working directory

/ (slashes)

• At the front of a file or directory name = the root directory
• Inside a path = just a separator
  
  
  

$ ls -F

• Tells ls to classify the output by adding a marker to file and directory names to indicate what they are.
• ‘/’ 구분자 있으면 directory, 없으면 파일.
• @: a link
• *: an executable
  
  
  

$ ls — help

도움말

$ man ls

List of its manual

$ ls -F Desktop

It works when a directory Desktop exists in my current working directory.

Typically, a Desktop directory exists in your home directory, which we assume is the current working directory of your bash shell.

$ cd Desktop
$ cd folder-1 (wherever you want to move to, in Desktop)

It changes the shell’s current working directory.
If we run pwd after it, we will see the folder-1’s path.

$ cd ..

• Moving up one directory level. Parent of the current directory. ($ cd 상위폴더를 입력하면 에러가 뜬다.)
  
• .. = A special directory name meaning “the directory containing this one”
  
  
  

$ cd (without giving a directory)

Returns to the home directory. (Use it when you’re lost in the filesystem)

$ ls -F -a

• = ls -Fa
• -a = show all
• It forces ls to show us file and directory names that begin with .
• . = The current working directory
  
  
  

~ (tilde character)

The current user’s home directory.
If my home directory is /Users/sally, then ~/data = /Users/sally/data

- (dash character)

The previous directory I was in.

cd .. vs cd -

The former brings you up, while the latter brings you back.

= A listing of files and directories in the root directory (/)

- (short options) vs -- (long options)

• Short options: Use when typing commands directly into the shell. It is to minimise keystrokes and get your task done faster
• Long options: Use in script to provide clarity