Dear Ron, thank you so much for your help. Please see the outputs: $ pg_lsclusters Ver Cluster Port Status Owner Data directory Log file 12 main 5432 online postgres /var/lib/postgresql/12/main /var/log/postgresql/postgresql-12-main.log 13 main 5433 online postgres /var/lib/postgresql/13/main /var/log/postgresql/postgresql-13-main.log # echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin But if I wanna uninstall postgresql-13 and postgresql-client-13, maybe the system will uninstall all the postgreslq packages (including version 12)??? # apt remove --purge postgresql-13 postgresql-client-13 Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: postgresql* postgresql-13* postgresql-client-13* Thanks in advance again, regards!!! El jue, 10 dic 2020 a las 13:22, Ron (<ronljohnsonjr@xxxxxxxxx>) escribió: > > On 12/10/20 9:43 AM, Roberto Carna wrote: > > Dear, I'm new at postgresql and I've installed it on a Debian 10 > > (stable) server. > > > > I don't know why, but after executing the psql command, I see this message: > > > > psql (13.1 (Debian 13.1-1.pgdg100+1), server 12.5 (Debian 12.5-1.pgdg100+1)) > > > > It seems both the posqgresql 12 and 13 are installed at the same time... > > > > I think I've installed postgresql 12, but here I see I have these > > packages after upgrade with apt: > > > > ii postgresql 13+223.pgdg100+1 all > > object-relational SQL database (supported version) > > ii postgresql-12 12.5-1.pgdg100+1 amd64 > > object-relational SQL database, version 12 server > > ii postgresql-13 13.1-1.pgdg100+1 amd64 > > object-relational SQL database, version 13 server > > ii postgresql-client-12 12.5-1.pgdg100+1 amd64 > > front-end programs for PostgreSQL 12 > > ii postgresql-client-13 13.1-1.pgdg100+1 amd64 > > front-end programs for PostgreSQL 13 > > ii postgresql-client-common 223.pgdg100+1 all > > manager for multiple PostgreSQL client versions > > ii postgresql-common 223.pgdg100+1 all > > PostgreSQL database-cluster manager > > > > Is this correct or do I have to uninstall the postgresql 13 packages ? > > "Correct" is in the eye of the beholder. Leave both installed, or deinstall > the one you don't want. > > > Within psql CLI, the version is: > > > > SELECT version(); > > > > PostgreSQL 12.5 (Debian 12.5-1.pgdg100+1) on x86_64-pc-linux-gnu, > > compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit > > (1 row) > > Run the pg_lsclusters to see what database instances (Postgres confusingly > calls them "clusters") are configured. > > Also, echo $PATH to see what binaries that Debian will see first. > > -- > Angular momentum makes the world go 'round. > >
