• Do not use the packages in Ubuntu's repositories. They are not reliably updated. If you use them, you will miss important stability and security fixes.
  • Determine your Ubuntu version by running the following command:
     ‪$ lsb_release -c
  • As root, add the following lines to /etc/apt/sources.list. Replace 'version' with the version you found in the previous step:
     deb https://deb.torproject.org/torproject.org version main
     deb-src https://deb.torproject.org/torproject.org version main
  • Add the gpg key used to sign the packages by running the following commands:
     ‪$ curl https://deb.torproject.org/torproject.org/A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89.asc | sudo apt-key add -
  • Run the following commands to install tor and check its signatures:
     ‪$ sudo apt-get update
     ‪$ sudo apt-get install tor deb.torproject.org-keyring