[SAC] [OSGeo] #2728: Upgrade osgeo6 to buster

[OSGeo]

#2728: Upgrade osgeo6 to buster
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 Reporter:  robe           |       Owner:  sac@…
     Type:  task           |      Status:  new
 Priority:  normal         |   Milestone:  Sysadmin Contract 2022-II
Component:  Systems Admin  |  Resolution:
 Keywords:                 |
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Comment (by robe):

 Also a side note.  for some reason osgeo6 has 2 versions of PostgreSQL
 running on it with PostgreSQL 12 being the only live one (11 is stopped on
 port 5433).  At a glance only the drone database is on the running
 instance.  drone has been moved to dronie-server dronie.osgeo.org, so this
 old drone is not needed anymore.

 I plan to uninstall PostgreSQL completely on osgeo6 before pushing forward
 with the upgrade.

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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2728#comment:1>
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