Based on Yenthe’s issue on Github and thanks to the new builds provided by Ashish Kulkarni, the procedure is straightforward:

sudo wget
sudo dpkg -i wkhtmltox_0.12.1.3-1~bionic_amd64.deb
sudo apt-get install -f
sudo ln -s /usr/local/bin/wkhtmltopdf /usr/bin
sudo ln -s /usr/local/bin/wkhtmltoimage /usr/bin

apt-get install -f will install the missing dependencies, which are shown as errors by the dpkg command.

You can find other builds for wkhtmltopdf suitable for Odoo on different Linux systems here:

Happy Odooing !