To become a Linux Wizard you must conquer Command Line Interface,

Part 1

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Start with, what is a CLI?

• It is a user interface, which doesn't have pretty graphics.
• We'll use the commands to mess around.

• Let's say if you want to open a folder on your PC, we'll be using commands for that, don't freak out, its easy than it seems just bear with me,

• By the way, CLI uses BASH as a programming language.

CLI

• here, haris is PC admin name
• cosmos is name of my PC
• ~ is representing Home directory
• $ means we're in the system shell, and ready to type commands

Understand Directories and their Path

• All folders are like Tree Hierarchy, starting from Root Directory,

Basic Commands

• pwd present working directory
• ls check the content of the directory
• cd change directory
• cd.. change directory to previous directory
• cd../..change directory to previous two times
• cd~ change directory to Home Directory
• flags are arguments/options
• ls -a to list all the hidden files
• ls -l show detailed versions of files
• ls -la show detailed version of all hidden files
• clear clear the terminal (ctrl+l)
• . current directory
• .. parent Directory
• ~home Directory
• - previous Directory
• mkdir make a directory
• touch Create a new file
• file give info about file
• gedit edit file
• cat view content of a file, concatenate files
• historydisplays history of commands that were executed
• uparrow display previous commands
• ctrl + r reverse search
• ctrl + cexit
• Autocomplete - type first letter of the directory then press tab
• cp copy files
• mv move files
• rm remove files
• mkdir -p make a directory in the subdirectory
• rm -r remove recursively
• rm -rv remove recursively and display removed directory
• find ~ -name find a file in home directory

or find it only with file type or only with file name

• find ~ -type d -name find folder
• man find the manual of any command
• whatis tells about command

Now you are ready to become a Linux Wizard,
See you in Part 2