airtime installing help

hey staff

after i was done installing the airtime-easy-setup package

i tried to go this next step

Install Airtime

Once the installation of airtime-easy-setup has completed, you can install the latest Airtime package on a desktop system using your usual package manager, such as Ubuntu Software Center, or Synaptic on Debian.

but the package was not the ubuntu software center when i tried to search for it on my ubuntu os using vmware workplace

so what am i doing wrong then

let me know please

thanks