From: Tom Lane <tgl@sss.pgh.pa.us>
To: Ekaterina Amez <ekaterina.amez@zunibal.com>
cc: pgsql-admin@lists.postgresql.org
Subject: Re: Should I care about this error "failed to link /usr/bin/psql
 [...] exists and it is not a symlink"?
In-reply-to: <516a1fbf-2323-4278-86f0-e7e4886f73e5@zunibal.com>
References: <516a1fbf-2323-4278-86f0-e7e4886f73e5@zunibal.com>
Comments: In-reply-to Ekaterina Amez <ekaterina.amez@zunibal.com>
	message dated "Tue, 03 Dec 2019 15:41:21 +0100"
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Date: Tue, 03 Dec 2019 10:14:59 -0500
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Ekaterina Amez <ekaterina.amez@zunibal.com> writes:
> I'm installing postgres 9.6 in a CentOS 7 computer that already has =

> postgres v9.2 installed (version that comes with CentOS installer) and =

> I've seen the message of this mail's subject.
> ...
> failed to link /usr/bin/psql -> /etc/alternatives/pgsql-psql: /usr/bin/p=
sql exists and it is not a symlink
> ...

I believe the issue here is that you've got Red Hat's postgresql packages
installed, and they're not set up to participate in alternatives
switching.  I'd suggest removing those packages --- having them installed
alongside PGDG postgres packages is going to lead to nothing but grief.

			regards, tom lane