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Environment Variables in Shell Scripting

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Environment Variables in Shell Scripting

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Questions and Answers

How can you make an environment variable available to subshells?

Using the local command

Using the global command

Using the export command (correct)

Using the import command

How are environment variables set manually?

Using the equal-sign assignment operator (correct)

Using the colon assignment operator

Using the minus-sign assignment operator

Using the plus-sign assignment operator

What does $HOSTNAME conventionally hold?

The current user's home directory

The current user's name

The computer's IP address

The computer's name (correct)

How can you refer to an environment variable on a bash command line?

Using the echo command Signup and view all the answers

How can you combine setting an environment variable and making it available to subshells into one line?

$ HOSTNAME=carson.example.com ; export HOSTNAME Signup and view all the answers

What do environment variables provide the means to pass to programs launched from a shell or a subshell?

Named data (variables) Signup and view all the answers

How is an environment variable set manually?

Via an equal-sign assignment operator Signup and view all the answers

What command is used to make an environment variable available to subshells?

export Signup and view all the answers

What is a subshell?

A child process created by either the shell or a shell script when a program is initiated Signup and view all the answers

What conventionally holds the computer’s name, such as carson.example.com?

$HOSTNAME Signup and view all the answers