Postgresql dump permission denied

Question

I get this error while trying to dump database, i entered

linuxuser $ sudo su postgres
linuxuser $ [sudo] password for linuxuser:...
$ pg_dump -h localhost mydb          


        

Answer 1

Write into directory where postgres user has write access. For instance /tmp.

$ pg_dump -h localhost mydb >/tmp/tempfile

In your attempt postgres user tries to create a file in some random directory belonging to the other user.