Howto change #Firebird password in #Ubuntu , #Debian ,#Linux

On Ubuntu with firebird 2.1 you can change password if you forgot it this way
1.First method
$sudo gsec -modify sysdba -pw 123456 (we trust root user muhahaha)

2.Second method
$sudo su
cd /var/lib/firebird/2.1/system
cp default-security2.fdb security.fdb
$ /etc/init.d/firebird2.1-classic restart

3.Third method
$ sudo dpkg-reconfigure firebird2.1-classic

On windows if you are in the Administrator group i guess you can change it with gsec from command line
C:\Program Files\Firebird\Firebird_2_1\bin> gsec -modify sysdba -pw 123456