Some basic steps on setting up Plutus on Ubuntu.

1) Make sure you have git installed sudo apt-get install git

2) Clone Plutus git clone git@github.com:input-output-hk/plutus.git

The following steps can be found here (https://nixos.org/learn.html)

3) Install Nix `curl -L https://nixos.org/nix/install | sh`

4) Make sure nix command is there, if not you might have todo this . /home/dimitry/.nix-profile/etc/profile.d/nix.sh

6) Edit config sudo pico /etc/nix/nix.conf. You might need to create this file.

7) Add the following two lines to the file /etc/nix/nix.conf.

substituters        = https://hydra.iohk.io https://iohk.cachix.org https://cache.nixos.org/
trusted-public-keys = hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ= iohk.cachix.org-1:DpRUyj7h7V830dp/i6Nti+NEO2/nhblbov/8MW7Rqoo= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
Two lines that need to be in you nix.conf file

8) From the plutus git directory, you can build using the following command nix build -f default.nix docs.papers.eutxo. This will build the Plutus core.

9) Make sure nix-shell command works from the git plutus folder.