Boot Block

Super Block

Inode Block

Data Block

Ordinary Files

Directory Files

Device Files

The Structure of UNIX File system

pwd, who, who ami

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