MariaDB5.5數據庫root密碼遺忘的處理

查找並運行 mysqld_safe 程序繞開 MariaDB5.5 數據庫密碼驗證

[root@localhost ~]# find / -name mysqld_safe
/usr/bin/mysqld_safe
[root@localhost ~]# /usr/bin/mysqld_safe --skip-grant-tables &

直接使用 mysql 命令登錄 MariaDB5.5 數據庫並修改 root 登錄密碼

[root@localhost ~]# mysql
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 1
Server version: 5.5.52-MariaDB MariaDB Server

Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec)

MariaDB [(none)]> 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
MariaDB [mysql]> UPDATE user SET password=password("New-password") WHERE user='root';
Query OK, 3 rows affected (0.00 sec)
Rows matched: 3  Changed: 3  Warnings: 0

MariaDB [mysql]> flush privileges;
Query OK, 0 rows affected (0.00 sec)

MariaDB [mysql]> exit
Bye

使用新密碼 New-password 登錄 MariaDB5.5 數據庫

[root@localhost ~]# ps au
USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root       3986  0.0  0.1 115380  2084 tty1     Ss+  19:53   0:02 -bash
root      22483  0.0  0.1 115384  2076 pts/0    Ss   21:54   0:00 -bash
root      22910  0.0  0.0 113252  1592 pts/0    S    21:59   0:00 /bin/sh /usr/bin/mysqld_safe --ski
mysql     23066  0.3  4.6 839268 86192 pts/0    Sl   21:59   0:00 /usr/libexec/mysqld --basedir=/usr
root      23091  0.0  0.0 151056  1824 pts/0    R+   22:00   0:00 ps au
[root@localhost ~]# kill -9 22910
[root@localhost ~]# mysql -uroot -pNew-password
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 2
Server version: 5.5.52-MariaDB MariaDB Server

Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> 
MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec)

MariaDB [(none)]> exit
Bye
[1]+  Killed                  /usr/bin/mysqld_safe --skip-grant-tables