How to change master password of Koha ?

Koha master login username and password is same as MySQL database, where data stored.
You have to change the password of koha_library database.
Then put new password in /etc/koha/sites/library/koha-conf.xml

Apply following commands in Applications > Accessories > Terminal

sudo su
mysql -u root -h localhost -p  

[enter the MySQL Root password "mysqlroot". see Readme file desktop to find password]

use mysql
SET PASSWORD FOR 'koha_library'@'localhost' = PASSWORD('newpassword here');
flush privileges;
quit;

leafpad /etc/koha/sites/library/koha-conf.xml

The file will open. You have to replace old password.

Search the line in leafpad editor,

Search > Jump To [Enter the line number 255]
You can find old password [katikoan] there. Place your new password there.
Save and close the file. Login Koha.