[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！！！
[ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist
原文：http://www.cnblogs.com/bass6/p/5778236.html