Installing AIR on Ubuntu 16

I have found this post while researching for installing Air on Ubuntu 16.04.

I haven't even started to install -- yet to decide procedure -- but I can answer your question. It may be useful for others.

The Ubuntu package that contains (and installs) the libgtk-x11-2.0.so.0 file is: libgtk2.0-0

Not to give you a fish only, but also to teaching you how to fish:  One way (among others, but this is the best for me) you could find it yourself is:

Install the apt-file package.

DESCRIPTION

   apt-file is a command line tool for searching files in packages for the APT package management system.

Notice that this tool will give you the answer for a file whether its package is installed or not. This is a great point.

So:

sudo apt-get update

sudo apt-get install apt-file

Once installed, do this:

apt-file update

This last command downloads the latest and greatest list of contents of packages from their remote sources --i.e., in all the repositories that your system uses -- (and the location can also be configured if you wanted).

After this, you can search offline at any time for any file, with the simple command:

apt-file search file_you_are_looking_for

This is extremely cool!

Example:

I want to search for all files which name start with libgtk-x11

Command:     apt-file search libgtk-x11

Here is the result of the search. Notice line 2.  The first part, before the ':' is the name of the package.  The part after the ':' is the name of the file.

$ apt-file search libgtk-x11
libgtk2.0-0: /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
libgtk2.0-0: /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0.2400.30
libgtk2.0-0-dbg: /usr/lib/debug/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0.2400.30
libgtk2.0-dev: /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.a
libgtk2.0-dev: /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so
$ 

Good luck for you, and for me.