Unix Shell Script Online Training
History of UNIX
Features 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:|
- 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
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
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
(sh,bash,ksh,csh,zsh,tcsh)
Creating shell script
Making shell scripting executable
Shell input & output
- echo, print, read
Backslash character constants
aliases
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
- Range opeerator
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
Awk concepts
