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?

    <p>Using the echo command</p> Signup and view all the answers

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

    <p>$ HOSTNAME=carson.example.com ; export HOSTNAME</p> Signup and view all the answers

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

    <p>Named data (variables)</p> Signup and view all the answers

    How is an environment variable set manually?

    <p>Via an equal-sign assignment operator</p> Signup and view all the answers

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

    <p>export</p> Signup and view all the answers

    What is a subshell?

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

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

    <p>$HOSTNAME</p> Signup and view all the answers

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