1.停止mysql
[root@localhost ~]# /etc/init.d/mysqld stop
2.往配置檔案新增skip_grant_tables引數
[root@localhost ~]# sed -i '/[mysqld]/ a \skip_grant_tables' /etc/my.cnf
3.啟動資料庫
[root@localhost ~]# /etc/init.d/mysqld start
4.修改root密碼，新密碼為111111
[root@localhost ~]# password=$(mysql -e "select password('111111')" | grep -v pass)
[root@localhost ~]# mysql -e "update mysql.user set password='$' from where user='root' and host='localhost';"
5.刪除配置檔案的skip_grant_tables引數
[root@localhost ~]# sed -i '/skip_grant_tables/d' /etc/my.cnf
6.重啟資料庫
[root@localhost ~]# /etc/init.d/mysqld restart
[root@localhost ~]# mysql -uroot -p111111
welcome to the mysql monitor. commands end with ; or \g.
your mysql connection id is 3
server version: 5.1.73 source distribution
oracle is a registered trademark of oracle corporation and/or its
affiliates. other names may be trademarks of their respective
owners.
type 'help;' or '\h' for help. type '\c' to clear the current input statement.
mysql>
至此，mysql資料庫的root密碼重置成功；
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