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Turning Commands Into a Bash Script

In this hands-on lab, we're going to write a shell script for connecting to Linux Academy Linux servers from another Linux (or Mac) host, without having to first accept the RSA fingerprint.

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Path Info

Clock icon Beginner
Clock icon 30m
Clock icon Jul 12, 2019

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Table of Contents

  1. Challenge

    Determine What Options Should Be Used with the ssh Command

    View the man page for the ssh command, and determine the option to use to disable host key checking.

  2. Challenge

    Build a Script from the Required Commands

    1. Create a bin folder in cloud_user's home directory.
    mkdir bin
    1. Use Vim to create the file in the new bin folder.
    vim bin/
    1. Create the following script.
    if [ -n $1 ]
        ssh -o StrictHostKeyChecking=no $login_user@$1
    1. Then, save the file by running.
  3. Challenge

    Execute and Verify the Script

    1. Save the file, and make it executable.
    chmod u+x bin/
    1. Run the script, passing as the first parameter to be assigned to $1.
    1. Press Ctrl + C to exit the password prompt.
  4. Challenge

    Add the New bin Directory to the PATH Variable

    1. Append to the .bashrc file in cloud_user's home directory to add the new bin folder to the PATH environment variable.
    echo 'PATH="$HOME/bin:$PATH"' >> .bashrc
    1. Source .bashrc to pick up the change.
    . .bashrc
    1. Verify that you can run without specifying the path to the script.

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