以下错误：
[root@iptst~]# mysql_upgrade -uadmin -p
Enter password:
Looking for 'mysql' as: mysql
Looking for 'mysqlcheck' as: mysqlcheck
FATAL ERROR: Upgrade failed
FATAL ERROR: Upgrade failed
mysql_upgrade -u root -p 检查是否用root账号进行的操作
Just add the configuration line to your my.cnf At the end add
[mysqlcheck] socket = /dbabcstorage/data/mysql5/mysql.sock
the correct value you can copy in the previous lines of my.cnf