hi i want to change koha 3 password and username on my OS ubuntu i used the mysql command mysql> SET PASSWORD FOR 'kohaadmin'@'localhost' = PASSWORD('newpassword'); Query OK, 0 rows affected (0.10 sec) but when i login to koha Koha error The following fatal error has occurred: Access denied for user 'kohaadmin'@'localhost' (using password: YES) at /usr/share/koha/lib/C4/Context.pm line 666. Compilation failed in require at /usr/share/koha/lib/C4/Circulation.pm line 25. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Circulation.pm line 25. Compilation failed in require at /usr/share/koha/lib/C4/Overdues.pm line 24. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Overdues.pm line 24. Compilation failed in require at /usr/share/koha/lib/C4/Members.pm line 27. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Members.pm line 27. Compilation failed in require at /usr/share/koha/lib/C4/Auth.pm line 27. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Auth.pm line 27. Compilation failed in require at /usr/share/koha/intranet/cgi-bin/cataloguing/addbiblio.pl line 24. BEGIN failed--compilation aborted at /usr/share/koha/intranet/cgi-bin/cataloguing/addbiblio.pl line 24. shall i must change the password in file in etc like koha on windows ... i asking what is this file i shall change password in it thank's