Shell Scripting

Unix-Shell Scripting

History of UNIX

Flavors of UNIX

Comparison of UNIX with Windows

Architecture of UNIX

UNIX File System

Different types of Files

Regular Files

Directory Files

Device Files

Basic Commands

pwd, logname, who, finger

Exit, date, cal

Creating Users & Groups

groupadd, groupdel

useradd, userdel

System startup & Shutdown

Init, halt, shutdown

Different Run levels

Different date formats

Working with files

cat, touch, rm

cp, mv

Working with Directories

mkdir, cd, rmdir, rm –r

Standard Input & Output

Redirecting output

Redirecting Input

Comparing Files

cmp, diff, comm

Searching files

find, locate, which

Zip files

gzip, gunzip

Displaying files

ls, ls options

Viewing long files

pg, more, head, tail

File Permissions

chmod, chown, chgrp, umask

Meta/Wild Card-characters

Class, Anchors

Repetition, Alteration

Group, Dot

Regular Expressions & Patterns

What is pattern

Usage of regular expression

Different types of pattern

Character pattern

Word pattern

Line pattern

Tools for Filters

grep, grep with options

Tools for Filters

grep, grep with options

Flat files

What are delimiters and its types?

Reading and Writing to files

Tools for column data

cut, paste

Tools for sorting

Sort by lines, Sort by fields

Sort with options, uniq

Changing information in files

tr, sed

Piping

usage of piping

piping with filters

tee command

Communication Tools

write, wall

mail, mail with options

Networking protocols

telnet, ftp

Disk status

du,  df with options

Job control

Foreground jobs, background jobs

Killing jobs, nohup

Process status

ps , ps with options

Editor Vi

3 modes

Command mode

Insert mode

Ex command mode

Shell Scripting

What is shell scripting?

Importance of shell scripting

Different types of shells

Creating shell script

Making shell scripting executable

Shell input & output

echo, print, read

Backslash character constants

Variables

What is variable

System defined variables

Environment files

User defined variables

Constant variables

Local & global variables

Special variables

Operators

Arithmetic variables

Relational numeric operators

Logical operators

Assignment operators

Conditional statements

if, if….else

if, elif

case

Looping

while, until, for

break, continue

File test commands

String test commands

exit & sleep commands

Command line arguments

Usage of COA

What is $0, S#, $*, $@, $? , $$

Job scheduling

cron

at

batch

Job scheduling

cron

at

batch