Adobe gave up supporting Acrobat reader for Linux long time ago, so it’s stuck at the old 32-bit version (9.5.5):
The tutorial websites tells you to use wget, but sometimes you might run into authentication problems. You can simply use the links above and double-click the .deb file to install.
Nonetheless, it doesn’t work right out of the box in modern 64-bit Linux. You’ll run into a missing library
on run because you didn’t install the 32-bit version of it. Enable i386 (x86 or 32-bit) packages first then get the 32-bit library:
dpkg --add-architecture i386
apt-get install libxml2:i386 ia32-libs
There are some GTK complaints if you run it on a command line, but it doesn’t affect the uses so you can safely ignore them