I'm trying to connect to psql using the below command but receiving message about unset local setting how could one solve it.
pi@raspberrypi ~/develop/radar $ psql -U postgres perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_CTYPE = "UTF-8", LANG = "en_GB.UTF-8" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). psql: FATAL: Peer authentication failed for user "postgres"