Unix Interview Questions and Answers


What is a UNIX OS shell?

A shell is an interactive user interface to an operating system services that allows
an user to enter commands as character strings or through a graphical user interface.
The shell converts them to system calls to the OS or forks off a process to execute
the command. System call results and other information from the OS are presented
to the user through an interactive interface. Commonly used shells are sh,csh,ks

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