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)

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> Dept. of Computer Science & Engineering 2 @ 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 Dept. of Computer Science & Engineering 3 @ 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? Dept. of Computer Science & Engineering 4 @ 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 Dept. of Computer Science & Engineering 5 @ Seoul National University

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 6