Directories Unix Command

1. cd – This command is used to change directory. Syntax : cd directory
2. mkdir – This command is used to make or create new directory. Syntax : mkdir directory
3. rmdir – This command is used to remove or delete directory. Syntax : rmdir directory
4. pwd– This command is used to print working (current) directory. Syntax : pwd

File Manipulation UNIX commands

1. cat – This is used to display file contents . Syntax  : cat filename
2. cp – This command is used to copy file from a particular source to destination. Syntax : cp source destination
3. mv – This command is used to move or rename files. Sysntax : mv oldname newname
4. rm – This command is used to remove file. Syntax : rm filename
5. pico – This command is used to create or modify file . Syntax : pico filename

Introduction to UNIX shell

Unix shell is command line interpreter. It processes one command or group of commands on command line when clicking Enter button.
There are several UNIX shell programs families. . The most important are the Bash shell, the Korn shell, and the TC shell. The shell families were developed for different purposes.

To create a UNIX script , use VI editor

Shell script begins with (#!) . #!/bin/ksh at the begining is used to invoke Korn Shell