Basic Linux Tutorial

Computer Tutorial

Introduction to Linux History of Linux Linux distributions Advantages of Linux Difference between Linux and Windows

Linux File System Root Directory Bin Directory Configuration Directories Data Directories Memory Directories Unix System Resources

» Basic Linux Commands » Login Related Command » User Login Related Commands » General Orientation Commands

File Managing Commands Working with Directories Working with Files Working with File Contents Filter Commands

File Permission & Access Ownership of Linux files Permissions of Linux files Changing file permissions Absolute or Numeric Mode Symbolic Mode Changing Owners and Groups

Input & Output Redirection Standard Output Redirection Standard Input Redirection Standard Error Redirection

Piping The T-Junction I/O Redirection & Piping

Other Linux Commands ARPA Services Commands Berkeley Services Commands Process Control Command Offline file Storage

Vi Editor Modes Used in Vi Editor Starting and Stopping Vi Cursor Movement Inserting and Deleting Text Replacing Text Search and Replace Cut, Copy, and Paste Importing and Exporting Text Configuring Vi Options

Shell Scripting Variables Passing Data Through Environment Variables Special Shell Variables Command Line Arguments The shift Command The read Command The echo Command

Branching The test Command Testing Numeric & String Values Testing Files & Logical Operators The if then fi Structure The if then else fi Structure The case Structure

Loops The let command The while-do-done Loop The until-do-done Loop The for-do-done Loop

General Orientation Commands

echo

echo command is used to display the value of a variable or print a line of text. The echo command is useful for conveying a message/information to user. This command is more useful when you are writing shell scripts then normal system administration use.

Synopsis :

echo [options] [string]

Example :

echo how are you
how are you

banner

banner is a command which prints a high resolution text banner on the system console or if you have a printer connected to your machine, you can redirect the output to the printer.

Synopsis :

banner [string]

Example :

$ banner jiyaul

clear

clear command is used to clear the screem or terminal.

Synopsis :

clear

Example :

clear

write

The write utility allows you to communicate with other users by copying lines from your terminal to theirs. The write sends a message to another user.

Synopsis :

write user [tty]

Example :

write user1 tty7

user - The user to write to.
tty - The specific terminal to write to, if the user is logged in to more than one session.

Basic Linux Tutorial

General Orientation Commands