I have upgrade mysql 5.0 to 5.1, now when i try to start it it fail and get the following error:
100422 15:45:27 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
/usr/libexec/mysqld: Table 'mysql.plugin' doesn't exist
100422 15:45:27 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
100422 15:45:27 InnoDB: Started; log sequence number 0 44233
100422 15:45:27 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist
100422 15:45:27 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
any idea how to fix this?