Linux下如何破解MariaDB数据库的root登录密码

忘记 root 登录密码

[root@localhost ~]# mysql -uroot -p123                  ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

查找并运行 mysqld_safe 程序绕开 MariaDB5.5 数据库密码验证

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

直接使用 mysql 命令登录 MariaDB5.5 数据库并修改 root 登录密码

[root@localhost ~]# mysqlWelcome to the MariaDB monitor.  Commands end with ; or \g.Your MariaDB connection id is 1Server version: 5.5.52-MariaDB MariaDB ServerCopyright (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 namesYou can turn off this feature to get a quicker startup with -ADatabase changedMariaDB [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: 0MariaDB [mysql]> flush privileges;Query OK, 0 rows affected (0.00 sec)MariaDB [mysql]> exitBye

使用新密码 New-password 登录 MariaDB5.5 数据库

[root@localhost ~]# ps auUSER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMANDroot       3986  0.0  0.1 115380  2084 tty1     Ss+  19:53   0:02 -bashroot      22483  0.0  0.1 115384  2076 pts/0    Ss   21:54   0:00 -bashroot      22910  0.0  0.0 113252  1592 pts/0    S    21:59   0:00 /bin/sh /usr/bin/mysqld_safe --skimysql     23066  0.3  4.6 839268 86192 pts/0    Sl   21:59   0:00 /usr/libexec/mysqld --basedir=/usrroot      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-passwordWelcome to the MariaDB monitor.  Commands end with ; or \g.Your MariaDB connection id is 2Server version: 5.5.52-MariaDB MariaDB ServerCopyright (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)]> exitBye[1]+  Killed                  /usr/bin/mysqld_safe --skip-grant-tables

使用其他密码不能登录 MariaDB5.5 数据库

[root@localhost ~]# mysql -uroot -pNew-passworddERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)[root@localhost ~]# rpm -qa mariadbmariadb-5.5.52-1.el7.x86_64