Postgresql installation error in Mint 19

Question

I am trying to perform the installation of posgresql on Mint 19 when I received a dependency error, making some searches discover that I could try the command dpkg --configure -a, but I received the following error:

 libc6-dbg:amd64 depende de libc6 (= 2.31-0ubuntu9.2); porém:
  Versão de libc6:amd64 no sistema é 2.31-0ubuntu9.1.

dpkg: erro ao processar o pacote libc6-dbg:amd64 (--configure):
 problemas de dependência - deixando desconfigurado
dpkg: problemas com dependências impedem a configuração de libc6-dev:amd64:
 libc6-dev:amd64 depende de libc6 (= 2.31-0ubuntu9.2); porém:
  Versão de libc6:amd64 no sistema é 2.31-0ubuntu9.1.

dpkg: erro ao processar o pacote libc6-dev:amd64 (--configure):
 problemas de dependência - deixando desconfigurado
Erros foram encontrados durante o processamento de:
 libc6-dbg:amd64
 libc6-dev:amd64

To solve I tried the command sudo apt-get install r-base, that generated the error:

 libc6-dev : Depende: libc6 (= 2.31-0ubuntu9.2) mas 2.31-0ubuntu9.1 está para ser instalado
 r-base : Depende: r-base-core (>= 3.6.3-2) mas não será instalado
          Depende: r-recommended (= 3.6.3-2) mas não será instalado
          Recomenda: r-base-html mas não será instalado
          Recomenda: r-doc-html mas não será instalado 

Searching a little more I tried to solve the above error with the command sudo apt-get install -f but I received the following error:

(Lendo banco de dados ... 316581 ficheiros e directórios actualmente instalados.)
A preparar para desempacotar .../libc6_2.31-0ubuntu9.2_amd64.deb ...
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: erro ao processar o arquivo /var/cache/apt/archives/libc6_2.31-0ubuntu9.2_amd64.deb (--unpack):
 o subprocesso do pacote libc6:amd64, novo script pre-installation retornou erro do status de saída 1
Erros foram encontrados durante o processamento de:
 /var/cache/apt/archives/libc6_2.31-0ubuntu9.2_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

I don’t have much skill with Linux, it’s the first time I use it and I really don’t know what else to do to try to solve it.

Answer 1

A process was blocking any command to update or install packages, after searching I found the command:

sudo Fuser -v /var/cache/debconf/config.dat

This command shows which processes were preventing me from giving the command , sudo apt-get install -f, and to install and update new packages.

After that it was only give the command to "kill" the process/processes/processes that was preventing to follow.

sudo Kill PID

These steps solved my dependency and package issues in Mint.