I am trying to set up to do some work with pg_dump, and I would like to be able to connect from my normal user to do this. This is on a Ubunt 18.04 installation. I have added the follwing to pg_hba.conf: host all all 0.0.0.0/0 md5 hostssl all all 0.0.0.0/0 md5 But when I try to login like this: psql stan postgres -W I get the following error, and yes, I set postgres'es password to something I know: tan@stantest:~$ psql stan postgres -W Password: psql: error: could not connect to server: FATAL: Peer authentication failed for user "postgres" stan@stantest:~$ What am I doing wrong? -- "They that would give up essential liberty for temporary safety deserve neither liberty nor safety." -- Benjamin Franklin