Linux Survival Guide 3. Essential Linux Commands 2018 Fall Computer - - PowerPoint PPT Presentation

• Dept. of Computer Science & Engineering

@ Seoul National University

Linux Survival Guide

• 3. Essential Linux Commands

2018 Fall Computer Concept & Practice

• Prof. Sang Lyul Min

TA: Minwook Kim (ace@snu.ac.kr)

• Dept. of Computer Science & Engineering

@ Seoul National University

Linux Commands

• CLI (command line interface)
• To interact with the server, our terminal provides mainly CLI.
• So we should be familiar with the Linux commands!
• List of Linux commands
• You can find almost the whole Linux commands here:
• https://fossbytes.com/a-z-list-linux-command-line-reference/
• Do we need them all?
• Tips
• Commands are case-sensitive.
• Some useful functions ( in bash shell )
• Up arrow key loads the previous commands.
• Tab key provides the autocomplete function.
• <ctrl> + <c> = cancel the running command, <shift> + <insert> = paste
• When you need help to use some command, type
• <command> + < - - help >

OR <man> + <command>

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• Dept. of Computer Science & Engineering

@ Seoul National University

Directories

• ls
• lists the contents of your current working directory.
• mkdir / rmdir
• makes or removes subdirectory in your current working directory.
• usage) mkdir [destpath]
• cd
• changes working directory from current.
• usage) cd [destpath]
• pwd
• prints the path of working directory
• Path Shortcuts
• . = current directory
• .. = parent directory
• / = root directory
• ~ = home directory

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• Dept. of Computer Science & Engineering

@ Seoul National University

Files

• cp
• makes a copy of a file or directory.
• usage) cp [origfilepath] [destpath]
• mv
• moves a file or a directory from one place to another, or change the name.
• usage) mv [origfilepath] [destpath]
• cat
• concatenates a file to standard output.
• usage) cat file
• File upload / download ( in local terminal )
• usage) scp [origfilepath] [destpath]
• ex) scp /users/ta/desktop/file.txt std10000@ccp.snucse.org:/home/std10000
• How to make files?

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• Dept. of Computer Science & Engineering

@ Seoul National University

vi editor & vim

• What it is?
• a terminal text editor originally created for the Unix operating system.
• Modes
• command mode (initial mode you will be in first)
• insert mode
• Basics
• vi <filename>
• You can make a new file or modify existing file.
• To change modes,
• command → insert : press [i] key
• insert → command : press <ESC> key
• In the command mode,
• <:q> : quit, <:q!> : quit without saving, <:wq> : quit with saving, <:w> : just save
• <u>: undo, <ctrl+r> : redo

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꼭 기억해야 할 것

• File & Directory commands
• ls, mkdir, rm, cd, pwd
• cp, mv, cat
• path shortcuts: . .. / ~
• vim
• input mode & command mode
• commands ( in command mode )
• :q :q!

:wq :w u ctrl+r