• Boot Block

• Super Block

• Inode Block

• Data Block

• Ordinary Files

• Directory Files

• Device Files

• The Structure of UNIX File system

• pwd, who, whoami

• exit, date, cal, exit, banner

• Hard Link

• Soft link or Symbolic Link

• Unlink

• tr, comm., tee, sed, nl

• cat, touch, rm

• cp, mv, ln, wc

• mkdir, cd, rmdir, rm

• ls, ls with options

• pg, more, less, head, tail, paste, cut, sort

• gzip, gunzip, zcat, compress

• Uncompress, pack, unpack and Pcat

• lp, cancel

• find, locate etc.,

• Redirecting Output

• Redirecting Input

• Standard error

• File substitution

• I/O redirection

• Process Execution

• Quoting metacharacters

• Positional parameters

• Special Parameters

• grep, grep with options

• fgrep, egrep

• What is Pattern?

• Usage of regular expression

• Different types of patterns

• Uniq

• Diff

• cmp

• tar, cpio

• Usage of piping

• Piping with filters

• chmod, chown, chgrp, umask

• write, wall, mail, mail with options

• telnet, ftp, rlogin, finger, etc..

• df, du, mount, unmount

• Foreground jobs

• Background jobs

• Killing jobs

• Nohup

• Ps

• Kill

• Pkill

• At

• Crontab

• Batch

• Command mode

• Insert mode

• Ex command mode

• What is shell scripting?

• Importance of shell scripting

• Different types of shells

• Creating Shell script

• Making shell script executable

• echo, print, read

• What is a variable?

• System defined variables

• Environment Variables

• User defined variables

• Constant variables

• Local and Global variables

• Special Variables

• Comments

• Arithmetic Operators

• Relational Operators

• Relational ASCII operators

• Logical Operators

• Assignment Operators

• If, if….else

• If… elif

• Case

while, until, for, break, continue

• Namespaces in UNIX
• Introduction to Message Queues
• Introduction to Different Types of System Calls
• Programming Aspects of Berkeley Sockets & Reserved Ports
• UNIX Domain Protocol
• Socket Addresses