A shell is an outer layer of a program that provides the user interface, or a way of commanding the computer. Shells are typically add on programs created for command driven operating systems, such as UNIX and Microsoft's DOS. The shell provides a menu driven or graphical icon oriented interface to the system in order to make it easier to use.
In other words, the shell is an executable file which is responsible for interpreting commands and transmitting them to the system and returning the result. Shell is used for interactive or non interactive commands. In interactive mode they accept input type from the keyboard when executing non interactive, shell execute commands read from a file.
In other words, the shell is an executable file which is responsible for interpreting commands and transmitting them to the system and returning the result. Shell is used for interactive or non interactive commands. In interactive mode they accept input type from the keyboard when executing non interactive, shell execute commands read from a file.
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