[Qgis-user] Debian/Ubuntu Install of 2.18 and 2.99 Together?

[Kory Roberts]

Is there a recommended way of concurrently installing both 2.18 and 2.99 on 
Debian/Ubuntu that isn't overly complicated (getting into and out of)?  I 
have the latest release of 2.18 installed using the repository 
http://qgis.org/ubuntugis.  I'd like to preview the upcoming version, but 
when I added the repository http://qgis.org/ubuntugis-nightly, it looked 
like the update manager was going to upgrade QGIS.  What I really wanted 
was to install them both.  Thanks.