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Incompatible change in mysql_com.h
I do not know if anyone noticed this; but there was an incompatible change from MySQL 5.1.22 to 5.1.23 in mysql_com.h file for NET structure by renaming the members last_errno and last_error to client_last_errno and client_last_error. This is really annoying as it not just breaks the compilation of lot of depending applications; and functionality will be annoy if one uses the wrong client library as there is no protocol version change. The change should have been done in alpha or beta code but not when its tagged as Release Candidate (RC). The change history does not even have a clue of this change.
Now; I noticed that in 5.1.24 the change is reverted back. I guess someone should be very careful when changing any structures related to the protocol as it could break the things silently.
Recover MySQL Database root password
By default, MySQL Server will be installed with root superuser without any password. You can connect to MySQL server as root without requiring password or by keying in blank password. However, if you have set the password for root and forget or unable to recall the password, then you will need to reset the root password for MySQL.
Login as root to the Unix-like (Unix, Linux or BSD) machine with the MySQL server.
Stop the MySQL server by using either of the following command
#/etc/init.d/mysql stop
Now you need to Start MySQL server without password
# mysqld_safe --skip-grant-tables &
Connect to mysql server using mysql client with the following command
# mysql -u root
Now you should be having mysql prompt
mysql>
Now you need to Setup new MySQL root user password
mysql> use mysql;
mysql> update user set password=PASSWORD(”newrootpassword”) where user=’root’;
mysql> flush privileges;
mysql> quit
Note: Replace newrootpassword with the new root password for MySQL server. Flush Privileges is needed to making the password change effect immediately.
Now you need to Stop MySQL Server using the following command
# /etc/init.d/mysql stop
Test Your New Mysql root password
First you need to start mysql server using the following command
# /etc/init.d/mysql start
# mysql -u root -p
Now it will prompt for root password and enter your new root password
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