Merge pull request #2480 from kofrezo/update_docs_install

Update Debian and Ubuntu distribution information

docs/source/install.rst

@@ -96,62 +96,68 @@ advantages:
   rolled back in case of incompatibility. The package can also be purged
   entirely from the system in seconds.
 
-stable ("stretch")
+stable ("buster")
 ------------------
 
-The version of Gunicorn in the Debian_ "stable" distribution is 19.6.0 (June
-2017). You can install it using::
+The version of Gunicorn in the Debian_ "stable" distribution is 19.9.0
+(December 2020). You can install it using::
 
-    $ sudo apt-get install gunicorn
+    $ sudo apt-get install gunicorn3
 
-You can also use the most recent version by using `Debian Backports`_.
-First, copy the following line to your ``/etc/apt/sources.list``::
+You can also use the most recent version 20.0.4 (December 2020) by using
+`Debian Backports`_. First, copy the following line to your
+``/etc/apt/sources.list``::
 
-    deb http://ftp.debian.org/debian stretch-backports main
+    deb http://ftp.debian.org/debian buster-backports main
 
 Then, update your local package lists::
 
     $ sudo apt-get update
 
 You can then install the latest version using::
 
-    $ sudo apt-get -t stretch-backports install gunicorn
+    $ sudo apt-get -t buster-backports install gunicorn
 
-oldstable ("jessie")
---------------------
+oldstable ("stretch")
+---------------------
 
-The version of Gunicorn in the Debian_ "oldstable" distribution is 19.0 (June
-2014). You can install it using::
+While Debian releases newer than Stretch will give you gunicorn with Python 3
+support no matter if you install the gunicorn or gunicorn3 package for Stretch
+you specifically have to install gunicorn3 to get Python 3 support.
 
-    $ sudo apt-get install gunicorn
+The version of Gunicorn in the Debian_ "oldstable" distribution is 19.6.0
+(December 2020). You can install it using::
 
-You can also use the most recent version by using `Debian Backports`_.
-First, copy the following line to your ``/etc/apt/sources.list``::
+    $ sudo apt-get install gunicorn3
 
-    deb http://ftp.debian.org/debian jessie-backports main
+You can also use the most recent version 19.7.1 (December 2020) by using
+`Debian Backports`_. First, copy the following line to your
+``/etc/apt/sources.list``::
+
+    deb http://ftp.debian.org/debian stretch-backports main
 
 Then, update your local package lists::
 
     $ sudo apt-get update
 
 You can then install the latest version using::
 
-    $ sudo apt-get -t jessie-backports install gunicorn
+    $ sudo apt-get -t stretch-backports install gunicorn3
 
-Testing ("buster") / Unstable ("sid")
--------------------------------------
+Testing ("bullseye") / Unstable ("sid")
+---------------------------------------
 
-"buster" and "sid" contain the latest released version of Gunicorn. You can
-install it in the usual way::
+"bullseye" and "sid" contain the latest released version of Gunicorn 20.0.4
+(December 2020). You can install it in the usual way::
 
     $ sudo apt-get install gunicorn
 
 
 Ubuntu
 ======
 
-Ubuntu_ 12.04 (trusty) or later contains the Gunicorn package by default so that
-you can install it in the usual way::
+Ubuntu_ 20.04 LTS (Focal Fossa) or later contains the Gunicorn package by
+default 20.0.4 (December 2020) so that you can install it in the usual way::
 
     $ sudo apt-get update
     $ sudo apt-get install gunicorn