From Fedora Project Wiki
Firebird is a cross-platform SQL-database.
These are quick instructions how to get it running on Fedora / CentOS system.
Installation
There are three versions of Firebird server software. You want superserver.
# yum install -y firebird-superserver # service firebird-superserver start
Chaging admin password
# gsec -user sysdba -pass masterkey -mo sysdba -pw newpwd1
Creating user
# gsec -user sysdba -password masterke add dude -pw dudepw1