What was the original default shell for UNIX, first released in 1977? Bourne-again shell Bourne shell Korn shell C shell
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What is the Bourne shell syntax to start or invoke a new Bourne Shell? True or False: The following Bourne Shell syntax will use the if control structure statement to determine if the file /home/user100/lab3 is a directory. if [ -d /home/user100/lab3 ] then echo lab3 is a dir fi This file is located in each user's home directory and is automatically executed when logging into the UNIX system when your default shell is set to the Bourne Shell. The command in the Bourne Shell to remove or erase the definition of a variable is "unset". The Bourne Shell command to execute a program or shell script as part of the current process is "source" or ".".
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