vi /etc/my.cnf 查看日志文件路径：
log-error=/var/log/mysqld.log
查看报错日志：
之前的服务器被别人拿了，所以自己买了台美国vps，根据笔记安装完启动mysql，又启动不了。
查看了错误日志
引用
090321 18:55:03 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data
/usr/local/mysql/libexec/mysqld: Table 'mysql.plugin' doesn't exist
090321 18:55:03 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
090321 18:55:03 InnoDB: Started; log sequence number 0 46409
090321 18:55:03 [Note] Recovering after a crash using mysql-bin
090321 18:55:03 [Note] Starting crash recovery...
090321 18:55:03 [Note] Crash recovery finished.
090321 18:55:03 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist
090321 18:55:03 mysqld_safe mysqld from pid file /usr/local/mysql/data/srv.willko.cn.pid ended
/usr/local/mysql/libexec/mysqld: Table 'mysql.plugin' doesn't exist
090321 18:55:03 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
090321 18:55:03 InnoDB: Started; log sequence number 0 46409
090321 18:55:03 [Note] Recovering after a crash using mysql-bin
090321 18:55:03 [Note] Starting crash recovery...
090321 18:55:03 [Note] Crash recovery finished.
090321 18:55:03 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist
090321 18:55:03 mysqld_safe mysqld from pid file /usr/local/mysql/data/srv.willko.cn.pid ended
这主要是因为安装时权限的问题，导致安装失败了。。我汗，怎么安装时候没提示呢。。
修改mysql下的data目录的权限chown -R mysql:mysql /data/mysql（datadir=/data/mysql），然后再执行mysql_install_db就好了
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