1、Linux账户密码修改
[root@localhost phpit]# passwd root
更改用户 root 的密码 。
新的 密码:
重新输入新的 密码:
passwd: 所有的身份验证令牌已经成功更新。
格式:passwd 用户名(中间有空格)
root用户可以修改所有用户的密码,普通用户只能修改自己的密码
2、mysql账户密码修改
下面针对忘记密码的情况做全程的记录:
第一步:(停掉正在运行的mysql)
[root@CentOs5 ~]# service mysqld stop
Stopping MySQL: [ OK ]
第二步:使用 “--skip-grant-tables”参数重新启动mysql
[root@CentOs5 ~]# mysqld_safe --skip-grant-tables & //此处回车,后面两行自动出现,注意&前面有空格
[1] 23810
[root@CentOs5 ~]# Starting mysqld daemon with databases from /var/lib/mysql
//不再出现新的内容时,再次按回车,返回root操作
第三步:用帐号登录mysql
[root@CentOs5 ~]# mysql -u root //回车
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.0.77 Source distribution
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
第四步:改变用户数据库
mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
第五步:修改密码,记得密码一定要用password()函数进行加密
mysql> update user set password=password('admin123') where user='root';
Query OK, 1 row affected (0.04 sec)
Rows matched: 1 Changed: 1 Warnings: 0
第六步:刷新权限表
mysql> flush previleges;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'previleges' at line 1
mysql> flush privileges; //注意:这里还要进行一次输入
Query OK, 0 rows affected (0.00 sec)
第七步:退出mysql
mysql> quit
Bye
第八步:对mysql进行重启
[root@CentOs5 ~]# service mysqld restart
STOPPING server from pid file /var/run/mysqld/mysqld.pid
100421 13:44:03 mysqld ended
Stopping MySQL: [ OK ]
Starting MySQL: [ OK ]
[1]+ Done mysqld_safe --skip-grant-tables
第九步:用更改过的密码重新登录即可。
[root@CentOs5 ~]# mysql -u root -p
Enter password: admin123
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.0.77 Source distribution
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> quit
Bye
[root@CentOs5 ~]#