Let's assume you have not removed any important packages since you installed Ubuntu, so that the set of packages required to install dkms on your computer are the same set of packages required to install dkms in the Live Environment.

1. On a computer that has Internet access, boot into a Live ISO.

   
   



2. Open a terminal and execute the following to download the required packages for dkms.

   
   

   (Although the gcc package files should also automatically be fetched, I explicitly listed gcc in the apt download command below, just to be sure to get all required dependencies).

   
   

    # Remove the CD rom from your sources list so all packages are downloaded.
   
    sudo sed -i "s|^deb cdrom|# deb cdrom|g" /etc/apt/sources.list
   
   
   
    # Add the universe repository (this will also do an apt update).
   
    sudo apt-add-repository universe
   
   
   
    # Download packages and dependencies.
   
    mkdir ~/Downloads/packages
   
    cd ~/Downloads/packages
   
    sudo apt --yes --download-only -o Dir::Cache::archives="./" install gcc dkms
   
   
   
    # Change the file permissions so you can work with them.
   
    sudo chown -R ubuntu:ubuntu *
   
   

   
   



3. Copy the above packages directory to a USB stick.

   
   



4. Plug the USB stick into your target computer (without Internet access).

   
   



5. Copy the packages directory from USB stick into your ~/Downloads directory on your target computer.

   
   



6. Open a terminal and execute the following:

   
   

    cd ~/Downloads/packages
   
   
   
    sudo dpkg -i *.deb