1) The three Unix shells covered in the slides are the C Shell, Korn Shell, and BASH .

a. What was the main goal in creating the C Shell?

b. How is the major difference between the C Shell and the Korn Shell/BASH?

c. How is BASH different than the Korn Shell?

 

a) The main goal of creating c shell was to create a shell with C language-like syntax.

b) Korn Shell and BASH are super set shells of C shell, meaning Korn and bash shell implements c shell within themselves

c) There are syntactical and difference of features in these bashes, for instance consider following

• We can easily display current directory in bash whereas we need to do some tricks in korn shell
• associative arrays are available in Korn shell but BASH does not have any..
• getting out of pipes is easier in bash compared to korn shell
• print command of Korn shell is better than echo of bash

Overall the BASH is a superset of Korn shell