Shell script

• Interprets user command which are directly entered by the user or which are read from a file called shell script/program
• Shell script are interpreted
• Typical operations performed by shell scripts include file manipulation, program execution, and printing text

Command to identify the shell type which the operating system supports

 cat /etc/shells 

sh shell: Bourne shell was the original shell on the unix system
bash shell: Bourne again shell .Its a improved version of sh shell. Its the standard GNU shell which is intuitive and extensive