Mysql数据库--修改root密码的几种方法(忘记密码&知道密码) Mysql数据库--修改root密码的几种方法（忘记密码&知道密码）🔻一、知道密码情况--修改root密码⛳ 1.1 方式1：alter 命令修改⛳ 1.2 方式2：set password命令修改🔻二、忘记密码情况-修改root密码⛳ 2.1 方式1：--init-file选项启动mysql2.1.1 🎈 停止mysql服务2.1.2 🎈 创建mysql-init-file.txt文件2.1.3 🎈 init-file的权限（最好赋权一下）2.1.3 🎈 使用--init-file选项启动mysql服务2.1.4 🎈 新密码连接测试（密码：Zyl@123321）2.1.5 🎈停止init-file启动的mysql进程并正常启动2.1.5 🎈 登录之后即可在mysql命令行修改为其他常用密码（此时知道密码情况--修改root密码）⛳ 2.2 方式2：使用skip-grant-tables 参数，跳过授权验证2.2.1 🎈 停止mysql服务2.2.2 🎈 通过--skip-grant-tables 参数启动mysql服务2.2.3 🎈 或者通过my.cnf 文件配置skip-grant-tables 参数启动mysql服务🔻三、总结—温故知新🔻一、知道密码情况–修改root密码⛳ 1.1 方式1：alter 命令修改🍁 通过alter user root identified by '新密码';mysql> use mysql; mysql> alter user root@'localhost' identified by 'Zyl@123456'; Query OK, 0 rows affected (0.01 sec) mysql>...⛳ 1.2 方式2：set password命令修改🍁 通过set password for 用户名@'用户地址' = '新密码';mysql> use mysql; mysql> set password for 'root'@'localhost' = 'Zyl@123456'; Query OK, 0 rows affected (0.01 sec) mysql> ...🔻二、忘记密码情况-修改root密码⛳ 2.1 方式1：--init-file选项启动mysql2.1.1 🎈 停止mysql服务[root@db-server ~]# systemctl stop mysqld [root@db-server ~]# systemctl status mysqld ● mysqld.service - MySQL Server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled) Active: failed (Result: exit-code) since Wed 2023-06-07 11:11:00 CST; 51min ago Docs: man:mysqld(8) http://dev.mysql.com/doc/refman/en/using-systemd.html Process: 2450 ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS (code=exited, status=1/FAILURE) Process: 2426 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS) Main PID: 2450 (code=exited, status=1/FAILURE) Status: "Server shutdown complete" Error: 13 (Permission denied) Jun 07 11:11:00 db-server systemd[1]: Starting MySQL Server... Jun 07 11:11:00 db-server systemd[1]: mysqld.service: main process exited, code=exited, status=1/FAILURE Jun 07 11:11:00 db-server systemd[1]: Failed to start MySQL Server. Jun 07 11:11:00 db-server systemd[1]: Unit mysqld.service entered failed state. Jun 07 11:11:00 db-server systemd[1]: mysqld.service failed. [root@db-server ~]# ...2.1.2 🎈 创建mysql-init-file.txt文件[root@db-server home]# touch init-file [root@db-server home]# vi init-file [root@db-server home]# cat init-file alter user 'root'@'localhost' identified by 'Zyl@123321'; [root@db-server home]# pwd /home [root@db-server home]# ...2.1.3 🎈 init-file的权限（最好赋权一下）[root@db-server home]# chmod 777 init-file [root@db-server home]# chown mysql:mysql init-file [root@db-server home]# ll total 4 -rwxrwxrwx 1 mysql mysql 58 Jun 7 15:56 init-file [root@db-server home]# ...2.1.3 🎈 使用–init-file选项启动mysql服务###启动命令#### mysqld --init-file=/home/init-file --user=mysql & [root@db-server ~]# mysqld --init-file=/home/init-file --user=mysql & [1] 1983 [root@db-server ~]# ...2.1.4 🎈 新密码连接测试（密码：Zyl@123321）mysql -u root -pZyl@1233212.1.5 🎈停止init-file启动的mysql进程并正常启动[root@db-server home]# ps -ef | grep mysql mysql 1983 1 1 16:28 ? 00:00:13 mysqld --init-file=/home/init-file --user=mysql root 2104 2048 0 16:50 pts/1 00:00:00 systemctl start mysqld mysql 2134 1 1 16:50 ? 00:00:00 /usr/sbin/mysqld root 2150 2048 0 16:50 pts/1 00:00:00 grep --color=auto mysql [root@db-server home]# kill -9 1983...####正常启动mysql### [root@db-server home]# systemctl start mysqld [root@db-server home]# systemctl status mysqld...2.1.5 🎈 登录之后即可在mysql命令行修改为其他常用密码（此时知道密码情况–修改root密码）🍁 通过alter user root identified by '新密码';mysql> use mysql; mysql> alter user root@'localhost' identified by 'Zyl@123456'; Query OK, 0 rows affected (0.01 sec) mysql> mysql>...🍁 通过set password for 用户名@'用户地址' = '新密码';mysql> use mysql; mysql> set password for 'root'@'localhost' = 'Zyl@123456'; Query OK, 0 rows affected (0.01 sec) mysql> ...⛳ 2.2 方式2：使用skip-grant-tables 参数，跳过授权验证--skip-grant-tables：跳过授权表认证--skip-networking：加了跳过授权表选项后所有的人都可以无密码登录，这是很不安全的，此选项不监听网络，防止恶意登录。2.2.1 🎈 停止mysql服务[root@db-server ~]# systemctl stop mysqld...2.2.2 🎈 通过--skip-grant-tables 参数启动mysql服务[root@db-server ~]# sudo mysqld --skip-grant-tables --user=mysql & [1] 2531 [root@db-server ~]# mysql Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 7 Server version: 8.0.32 MySQL Community Server - GPL Copyright (c) 2000, 2023, Oracle and/or its affiliates. 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> ...2.2.3 🎈 或者通过my.cnf 文件配置skip-grant-tables 参数启动mysql服务注：修改完密码之后，去除该参数--以便保障数据库安全性。[root@db-server ~]# vi /etc/my.cnf ####添加内容： skip-grant-tables...启动mysql[root@db-server home]# systemctl start mysqld...🍁 通过alter user root identified by '新密码';mysql> use mysql; mysql> alter user root@'localhost' identified by 'Zyl@123456'; Query OK, 0 rows affected (0.01 sec) mysql> mysql>...🍁 通过set password for 用户名@'用户地址' = '新密码';mysql> use mysql; mysql> set password for 'root'@'localhost' = 'Zyl@123456'; Query OK, 0 rows affected (0.01 sec) mysql> ...注：修改完密码之后，去除 skip-grant-tables 参数--以便保障数据库安全性。🔻三、总结—温故知新❓ 本篇文章详细介绍了在linux中忘记mysql的root用户密码修改步骤。❓ 温馨提示：不管是工作中，还是学习中，要养成备份的习惯，不要觉得太麻烦，或者觉得没必要，不要存在侥幸心理。❓ 人有的时候总觉得很多事可以偷懒，但是有时候又要为自己的偷懒付出更大的代价。