How to install wkhtmltopdf 0.12.1 in Ubuntu 18.04 LTS

Follow this step

sudo wget https://builds.wkhtmltopdf.org/0.12.1.3/wkhtmltox_0.12.1.3-1~bionic_amd64.deb

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

You can find other builds for wkhtmltopdf 0.12.1.3 suitable for Odoo on different Linux systems here: https://builds.wkhtmltopdf.org/0.12.1.3/

Thanks