Re: error: connection to server on socket...

On 8/1/23 11:42, Amn Ojee Uw wrote:
> Ah! Adrean, here is something interesting.
> 
> /*pg_lsclusters*/ displays the following information
> 
> /*Ver Cluster Port Status                Owner    Data 
> directory              Log file*//*
> *//*12  main    5432 down,binaries_missing postgres 
> /var/lib/postgresql/12/main /var/log/postgresql/postgresql-12-main.log*//*
> *//*15  main    5433 online                postgres 
> /var/lib/postgresql/15/main /var/log/postgresql/postgresql-15-main.log*/
> 
> What is version 12 is doing there, I thought that I had completely 
> removed it and replaced it with version 15!!

You didn't, read:

https://www.postgresql.org/message-id/20230731125247.puiaz7fjkfvljdwy%40alvherre.pgsql

and

https://www.postgresql.org/message-id/33f0fc61-2d0f-60bd-e0ed-4cada3c30301@aklaver.com

The clue is "binaries_missing".

You remove(ed) all the files except the conf files.


> Should I remove that log file?

Run:

sudo apt purge postgresql-12

That will take care of removing all the conf files.


To connect you need to specify the correct port, 5433 or do:

sudo vi /etc/postgresql/15/main/postgresql.conf

and change

port = 5433

to

port = 5432

Then restart the server.

You then need to spend some time at the links in this message:

https://www.postgresql.org/message-id/c1ad730a-a84a-ae97-2f23-6891cb06ef26%40aklaver.com

> 
> Regarding /pf@pfortin.com/ assertion, I am working with a _/Debian 12/_ 
> machine and /*ls -l /tmp/.s.PGSQL.5432*/
> displays the following error message : /*ls: cannot access 
> '/tmp/.s.PGSQL.5432': No such file or directory*/
> 
> As for Tomas Pospisek questions :
> * as which user are you doing that (you can see that via `id`)?
> 
>     Due to matters of security let us assume that the output is :
>     /*id*//*
>     *//*uid=1000(my_account) gid=1000(my_account)
>     groups=1000(my_account),24(cdrom),25(floppy),27(sudo),29(audio),30(dip),44(video),46(plugdev),100(users),*/
>     /*106(netdev),111(bluetooth),113(lpadmin),116(scanner),122(postgres),1001(tomcat)*/
> 
> * in which directory are you executing it  (you can see that via `pwd`)?
> 
>     /*/home/*//*my_account*/
> 
> * what is the home directory of the postgres user (you can see that via 
> `grep postgres /etc/passwd`) /*
> */
> 
>     /*~$ grep postgres /etc/passwd*//*
>     *//*postgres:x:113:122:PostgreSQL
>     administrator,,,:/var/lib/postgresql:/bin/bash*/
> 
> * what does `ls -ld /var/run/postgresql/; ls -l 
> /var/run/postgresql/.s.PGSQL.5432` show?
> 
>     /*ls -ld /var/run/postgresql/*//*
>     *//*drwxrwsr-x 2 postgres postgres 100 Jul 31 20:45
>     /var/run/postgresql/*/
> 
>     /*ls -l /var/run/postgresql/.s.PGSQL.5432*//*
>     *//*ls: cannot access '/var/run/postgresql/.s.PGSQL.5432': No such
>     file or directory*/
> 
> 
> - what does `journalctl -xeu postgresql` say?
> 
>     /*sudo journalctl -xeu postgresql*//*
>     *//*[sudo] password for *//*/**//*my_account*/: *//*
>     *//*░░ Support: https://www.debian.org/support*//*
>     *//*░░ *//*
>     *//*░░ A start job for unit postgresql.service has begun execution.*//*
>     *//*░░ *//*
>     *//*░░ The job identifier is 3496.*//*
>     *//*Jul 31 20:45:13 *//*tree.com systemd[1]: Finished
>     postgresql.service - PostgreSQL R>*//*
>     *//*░░ Subject: A start job for unit postgresql.service has finished
>     successfully*//*
>     *//*░░ Defined-By: systemd*//*
>     *//*░░ Support: https://www.debian.org/support*//*
>     *//*░░ *//*
>     *//*░░ A start job for unit postgresql.service has finished
>     successfully.*//*
>     *//*░░ *//*
>     *//*░░ The job identifier is 3496.*//*
>     *//*lines 4-16/16 (END)*/
> 
> - what does `tail -n 20 
> /var/log/postgresql/postgresql-*-qgisclouddb.log` show?
> 
>     /*sudo tail -n 20 /var/log/postgresql/postgresql-*-qgisclouddb.log*//*
>     *//*tail: cannot open
>     '/var/log/postgresql/postgresql-*-qgisclouddb.log' for reading: No
>     such file or directory*/
> 
> 
> I hope I was able to answer all the interesting questions posted as 
> reply to my original post.
> 
> /Thanks folks, I really appreciate the time you have dedicated to my 
> question./
> 
> 
> On 8/1/23 10:35 a.m., Adrian Klaver wrote:
>> On 8/1/23 03:22, Amn Ojee Uw wrote:
>>> Using the following command on my Debian 12 machine:
>>>
>>> /*sudo apt-get install postgresql postgresql-15 
>>> postgresql-client-common postgresql-common postgresql-contrib 
>>> postgresql-doc phppgadmin
>>> */
>>>
>>>
>>> and following the instruction on this 
>>> <https://wiki.debian.org/PostgreSql#User_access> web page I have 
>>> installed PostgreSQL-15.
>>> The installation went smooth, until the following command was issued :
>>>
>>> /*sudo -u postgres psql*/
>>>
>>> ... I get an error message that reads:
>>>
>>> /*could not change directory to "/home/my_account": Permission 
>>> denied*//*
>>> *//*psql: error: connection to server on socket 
>>> "/var/run/postgresql/.s.PGSQL.5432" failed: No such file or 
>>> directory*//*
>>> *//*    Is the server running locally and accepting connections on 
>>> that socket?*/
>>>
>>> What can I do to resolve this issue?
>>
>> Run
>>
>> pg_lsclusters
>>
>> and see what port the server is running on.
>>
>>>
>>> Thanks in advance.
>>>
>>

-- 
Adrian Klaver
adrian.klaver@aklaver.com