On 4/22/24 14:37, Atul Kumar wrote:
Can we edit the socket to change the hostname in it ?

On Ubuntu 22.04 install, given:

srwxrwxrwx  1 postgres postgres    0 Apr 22 14:01 .s.PGSQL.5432=
-rw-------  1 postgres postgres   68 Apr 22 14:01 .s.PGSQL.5432.lock

The contents of .s.PGSQL.5432.lock(the file that indicates a Postgres instance has a lock on the socket) are:

862
/var/lib/postgresql/15/main
1713795311
5432
/var/run/postgresql

There is no hostname to be changed as you are working with a local socket.


Regards.

On Tue, Apr 23, 2024 at 2:41 AM Ron Johnson <ronljohnso...@gmail.com <mailto:ronljohnso...@gmail.com>> wrote:

    On Mon, Apr 22, 2024 at 4:14 PM Atul Kumar <akumar14...@gmail.com
    <mailto:akumar14...@gmail.com>> wrote:

        Hi,

        I have postgresql  version 15 running on centos7.

        I have below query that reads hostname from /tmp directory:

        psql postgres -A -t -p 5432 -h /tmp/ -c 'SELECT
        pg_is_in_recovery();'


    If you installed from the PGDG repository (possibly also the CENTOS
    repos, but I'm not sure), then the domain socket also lives in :
    /var/run/postgresql

    * I find that more expressive than /tmp.
    * No need to specify the host when using sockets.
    * Using a socket name makes parameterizing the hostname easier in
    scripts.



--
Adrian Klaver
adrian.kla...@aklaver.com



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