A PostgreSQL Fatal error like role or username does not exist. This is a very common error which is facing by PostgreSQL Users. Actually, this is happening because of misconfiguration of System username and Database Username. Most of the Linux users are trying to log in PostgreSQL using root user. But actually, this is wrong. […]

I'm Anvesh Patel, a Database Engineer certified by Oracle and IBM. I'm working as a Database Architect, Database Optimizer, Database Administrator, Database Developer. Providing the best articles and solutions for different problems in the best manner through my blogs is my passion. I have more than six years of experience with various RDBMS products like MSSQL Server, PostgreSQL, MySQL, Greenplum and currently learning and doing research on BIGData and NoSQL technology. -- Hyderabad, India.