From: Tom Lane <tgl@sss.pgh.pa.us>
To: Adrian Klaver <adrian.klaver@aklaver.com>
cc: Arbol One <ArbolOne@hotmail.ca>, pgsql-general@lists.postgresql.org
Subject: Re: Where is my app installed?
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Comments: In-reply-to Adrian Klaver <adrian.klaver@aklaver.com>
	message dated "Thu, 22 Aug 2024 17:49:53 -0700"
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Date: Thu, 22 Aug 2024 22:21:52 -0400
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Adrian Klaver <adrian.klaver@aklaver.com> writes:
> On 8/22/24 17:36, Arbol One wrote:
>> After installing PostgreSQL on my Debian-12 machine, I typed 'postgres 
>> --version' and got this msg:
>> *bash: postgres: command not found*
>> 'psql --version', however, does work and gives me this message :
>> *psql (PostgreSQL) 16.3 (Debian 16.3-1.pgdg120+1)*
>> Obviously postgres is not in the path, but I don't know where the 
>> 'apt-get' installed it or why it did not add it to the path.

> As to where the  postgres command is:
> ls -al /usr/lib/postgresql/16/bin/

Theory 1: postgres is packaged in a "postgresql-server" package
and the OP only installed the base (client-side) package.

Theory 2: postgres is installed into some directory not in the OP's
PATH, such as /usr/sbin.  Since it's primarily used as a daemon,
this'd be a reasonable thing for a packager to do.

I'd bet a nickel on #1, though, because I've not seen too many
packagers put postgres somewhere other than where they put psql.
"Separate server package" is extremely common though.

			regards, tom lane