Enlist the key features of Korn Shell.
The Korn shell is the most advanced as well as an extension to the Bourne Shell which is backward-compatible.
Some of the features of the Korn shell are listed below :
* Perform command line editing.
* Maintains command history so that the user can check the last command executed if required.
* Additional flow control structures.
* Debugging primitives who help programmers debug their shellcode.
* Support for arrays and arithmetic expressions.
* Ability to use aliases which are defined as the shorthand names for commands.
