Cannot use commands 'postgres' or 'pg_ctl'

Question

I am on Unix. I have got postgresql-9.3 installed. When I want to start the server using `pg_ctl` or `postgres`, the terminal gives me: ``` The program 'postgres' is currently not installed. You can install it by typing: sudo apt-get install postgres-xc ``` Can't I start the server without this postgres-xc?

Accepted Answer

This must be remnants of the `postgres-xc` package you had installed previously.

Since you just installed `postgresql-9.3` and don't seem to have any databases in use, yet, I suggest to completely purge all postgres packages.

```
sudo apt-get purge postgresql-9.2
sudo apt-get purge postgresql-xc
...
```

Until there's nothing left:

```
dpkg -l | grep postgres
```

Then start from scratch. Your instance of `pg_ctl` seems to belong to the package `postgres-xc`. This should be gone after you've uninstalled the package. Find out with one of these commands:

```
dpkg -S pg_ctl
dlocate pg_ctl
apt-file search pg_ctl
```

`pg_ctlcluster` is provided by the package `postgresql-common`. `pg_ctl` is provided by the package `postgresql-9.3`.

More about starting Postgres in the manual.

Cannot use commands 'postgres' or 'pg_ctl'

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