[ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist

 

[root@DBM scripts]# ./mysql_install_db --user=mysql --basedir=/app/servers/mysql-5.5.20 --datadir=/app/servers/mysql-5.5.20/data/

加上--datadir=/app/servers/mysql-5.5.20/data/　　问题解决！！！