Skip to content

Latest commit

 

History

History
93 lines (90 loc) · 2.72 KB

cheatsheet.md

File metadata and controls

93 lines (90 loc) · 2.72 KB
Raw

CADS Linux Cheatsheet

Basic Commands

cd

  • Stands for change directory. Can be used to navigate around the shell
  • e.g. cd instructions will move your location into the instructions folder
  • cd .. can be use to move up a directory
  • cd ~ or just cd can be used to jump back to your home directory

ls

  • Stands for list. Can be use to show what files and folders are in your current directory
  • e.g. 
    user@CADS ~ $ ls
research instructions animals
  • ls -l shows more detailed information of the files, including the permissions and who owns the file
  • ls -a shows all files, including the current one (.), the above one (..) and hidden ones (ones that start with . e.g. .secret.txt)

pwd

  • Stands for print working directory. It will show you your current location within the file system.

cat

  • Stands for concatenate. Can be used to join text files and print the output.
  • For these tasks we'll use it to only print out a file to the screen
  • e.g. 
    user@CADS instructions $ cat level1.txt
whatever is in level1.txt
...

nano

  • nano is a terminal based text editor. It will be used to edit the files of today's challenges.
  • usage nano filename.txt
  • Once in nano you can move around as if it was notepad on windows. To close it press ctrl-x, press y if you want to save the file.

mkdir

  • Stands for make directory. Can be use to create new folders.
  • e.g. 
    user@CADS ~ $ mkdir homework
user@CADS ~ $ ls
research instructions animals

cp

  • Stands for copy. Can be used to copy files and folders.
  • Usage cp <file to copy> <destination of file>
  • e.g. if you wanted to copy cow.txt to sheep.txt 
    user@CADS animals $ cp cow.txt sheep.txt
user@CADS animals $ ls
cow.txt sheep.txt whale.txt
  • If you want to copy directories you must use cp -r

mv

  • Stands for move. Can be used for moving files and renaming files.
  • Usage mv <file to move> <destination of file>
  • e.g. if you wanted to rename whale.txt to fish.txt 
    user@CADS animals $ mv whale.txt fish.txt
user@CADS animals $ ls
cow.txt fish.txt

whoami

  • Prints the current username

adduser

  • Can be used to add new users.
  • You can use the flag -m to include creating a home directory
  • e.g. 
    user@CADS ~ # adduser -m jeff
user@CADS  $ ls /home
jeff

su

  • Stands for switch user
  • e.g. 
    user@CADS ~ $ su jeff
jeff@CADS ~ $ whoami
jeff

sudo

  • sudo elavates the user to root for one command
  • Usage: sudo <command>
  • e.g. 
    user@CADS ~ $ sudo whoami
root
user@CADS ~ $ whoami
user

apt

  • Apt is a package manager on Ubuntu.
  • Packages can be installed using: apt install <package name>