Re: could not bind IPv4 address "127.0.0.1": Address already in use

Siddharth Jain <siddhsql(at)gmail(dot)com> writes:
> But when I try to start the server I get this:

> 2023-03-07 17:16:43.228 PST [25925] LOG: could not bind IPv6 address
> "::1": Address already in use
> 2023-03-07 17:16:43.228 PST [25925] HINT: Is another postmaster already
> running on port 5432? If not, wait a few seconds and retry.
> 2023-03-07 17:16:43.228 PST [25925] LOG: could not bind IPv4 address
> "127.0.0.1": Address already in use
> 2023-03-07 17:16:43.228 PST [25925] HINT: Is another postmaster already
> running on port 5432? If not, wait a few seconds and retry.

That's pretty clear I think: the ports are already bound.

> I ran:
> netstat -ln -p tcp | grep 5432
> and there is no output.

This is the wrong incantation for this purpose. Try

netstat -an -p tcp | grep 5432

I expect you'll see a couple of ports in LISTEN state. Unfortunately,
netstat is not much help at locating the processes listening to such
ports. This might be more help:

lsof -n | grep 5432

regards, tom lane