shell script is powerful and easy to use programming language. They are used for doing multiple jobs at a time. In shell script memory allocation is done on interpreter in the form of byte. shell script are interpreted not complied. shell read commands from the script and search those command in the system . complier convert program into machine readable form
shell is a program that takes command typed by the user and calls operating system to run those commands. Commonly used commands in shell script are—
1. unset —-used to delete variable
2. echo——used for printing
3. read——preform the function of scanf
