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Which one of the following command will display the name of the shell we are working on?

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Which one of the following command will display the name of the shell we are working on?

(a) echo shell

(b) echo $

(c) echo $SHELL

(d) echo $$

This question was addressed to me in examination.

Question is from Shell Basics in portion The Shell of Unix

1 Answer

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Correct option is (c) echo $SHELL

Explanation: When we run the command echo $SHELL, it will display the current shell on which we are working. The output of the command is the absolute pathname of the shell’s command file. If $SHELL evaluates to/bin/bash, our login shell is bash.

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