For installing Secondo on Ubuntu 20.04, a few steps are needed. These are:

1. Install Ubuntu 20_04 from an Installation medium to hard disk and start it.
2. Download the file InstallSDK_Ubuntu_20_04.bash and store it into your home directory.
3. Open a terminal.
4. If Secondo is installed the first time, some system tools must be installed. This is done by the script automatically. Note that the user has to be in the sudoers list for that.
   Execute the script: bash InstallSDK_Ubuntu_20_04.bash
   The script will ask for your password for installing the required tools.
   Alternatively, you can enter the lines of the script manually.
   If Secondo should be installed just for a further user, the tools are already present and the user can be outside the sudoer list. In this case, run the script, with the option -onlyrc, e.g.:
   bash InstallSDK_Ubuntu_20_04.bash -onlyrc
   This will create a file .secondorc in the user's home directory.
5. Insert the following line at the end of the file $HOME/.bashrc
   source $HOME/.secondorc $HOME/secondo
6. Download the latest Secondo version and unpack it.
   
7. Close the terminal (exit) and open a new one.
8. Go into directory $HOME/secondo and compile Secondo just by typing make