Adobe Air for Linux is no longer supported, but you can still install the version 2.6 on Ubuntu & Linux Mint with a little tweak.

If you’re running programs that are built on AIR, follow the below steps to install Adobe Air first.

1.) Press Ctrl+Alt+T to open a terminal window, I’ll do the job by running a few commands in terminal.

2.) Download Adobe Air 2.6 for Linux via wget command, it’s about 15MB.

wget http://airdownload.adobe.com/air/lin/download/2.6/AdobeAIRInstaller.bin

3.) Install this package for 64-bit system:

sudo apt-get install ia32-libs

4.) Now the important part is to create a symbolic link to your gnome keyring:

• For 32-bit, run the below 2 commands one by one:

  sudo ln -s /usr/lib/i386-linux-gnu/libgnome-keyring.so.0 /usr/lib/libgnome-keyring.so.0
  sudo ln -s /usr/lib/i386-linux-gnu/libgnome-keyring.so.0.2.0 /usr/lib/libgnome-keyring.so.0.2.0

• For 64-bit, run this:

  sudo ln -s /usr/lib/x86_64-linux-gnu/libgnome-keyring.so.0 /usr/lib/libgnome-keyring.so.0
  sudo ln -s /usr/lib/x86_64-linux-gnu/libgnome-keyring.so.0.2.0 /usr/lib/libgnome-keyring.so.0.2.0

5.) Now give executable permission to the downloaded .bin package:

chmod +x AdobeAIRInstaller.bin

6.) Finally run it:

./AdobeAIRInstaller.bin

Follow the setup wizard, and done!

(Optional) To free up disk space, run below commands to remove downloaded package and the symbolic link you just created:

rm AdobeAIRInstaller.bin; sudo rm /usr/lib/libgnome-keyring.so.0 /usr/lib/libgnome-keyring.so.0.2.0

Enjoy!