How can I install the latest wkhtmltopdf on Ubuntu 16.04?

Steps to install wkhtmltopdf 0.12.3 on Ubuntu 16.04.

Log in as root, then:

cd ~
wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.3/wkhtmltox-0.12.3_linux-generic-amd64.tar.xz
tar vxf wkhtmltox-0.12.3_linux-generic-amd64.tar.xz 
cp wkhtmltox/bin/wk* /usr/local/bin/

And you can confirm with:

$ wkhtmltopdf --version
wkhtmltopdf 0.12.3 (with patched qt)

By the way, I chose 0.12.3 instead of 0.12.4 because of a strange page sizing issue, discussed on the wkhtmltopdf GitHub.

$ sudo apt-get install wget
$ mkdir wkhtmltopdf-download
$ cd wkhtmltopdf-download
wkhtmltopdf-download $ wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
wkhtmltopdf-download $ tar xf wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
wkhtmltopdf-download $ cd wkhtmltox/bin

Then just move the binaries somewhere in your PATH. See

$ echo $PATH

For me, it was mv * /home/math/bin. And finally:

$ wkhtmltopdf --version
wkhtmltopdf 0.12.4 (with patched qt)