# sudo -u postgres psql
could not change directory to "/root"
psql (9.1.11)
Type "help" for help.
postgres=# \password
Enter new password:
Enter it again:
postgres=# \q
Backup the pg_hba.conf file by copying it.
Edit the pg_dba.conf, change `METHOD` to 'trust'
Restart the PostgreSQL server.
psql -U postgres.
ALTER USER postgres WITH PASSWORD 'new_password';
Restore the pg_dba.conf file.
Restart the PostgreSQL server.$ sudo -u postgres psql
Then type
# ALTER USER my_user_name with password 'my_secure_password';sudo sed -ibak 's/^\([^#]*\)md5/\1trust/g' /opt/bitnami/postgresql/conf/pg_hba.conf
sudo -u postgres pg_ctl reload
pg_ctl -D "C:\Program Files\PostgreSQL\12\data" restart
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