安装MylSQL-rpm安装方式
1.Linux平台安装MySQL有以下几种方式，本文主要实验rpm包安装
（1）通过RPM包安装；
（2）直接使用编译好的二进制文件，通常是个tar包（或者是个tar.gz）解压后直接使用；
（3）下载源代码，采用自定义编译选项的方式安装，安装步骤最繁琐，但是编译选项配置得当，能够提升性能，而且这也是最灵活的一种方式。
2.下载RPM包
https://downloads.mysql.com/archives/community/
3.清理环境
[root@localhost soft]# rpm -qa | grep mysql [root@localhost soft]# rpm -qa | grep mariadb mariadb-libs-5.5.64-1.el7.x86_64
[root@localhost soft]# rpm -qa | grep mysql
[root@localhost soft]# rpm -qa | grep mariadb
mariadb-libs-5.5.64-1.el7.x86_64
[root@localhost soft]# rpm -e mariadb-libs*
错误：未安装软件包 mariadb-libs*
[root@localhost soft]# rpm -e mariadb-libs-5.5.64-1.el7.x86_64
错误：依赖检测失败：
libmysqlclient.so.18()(64bit) 被 (已安裝) postfix-2:2.10.1-7.el7.x86_64 需要
libmysqlclient.so.18(libmysqlclient_18)(64bit) 被 (已安裝) postfix-2:2.10.1-7.el7.x86_64 需要
重新卸载
[root@localhost ~]# rpm -qa | grep mariadb mariadb-libs-5.5.64-1.el7.x86_64 [root@localhost ~]# yum remove mariadb-libs-5.5.64-1.el7.x86_64 已加载插件：fastestmirror, langpacks 正在解决依赖关系 --> 正在检查事务 ---> 软件包 mariadb-libs.x86_64.1.5.5.64-1.el7 将被 删除 --> 正在处理依赖关系 libmysqlclient.so.18()(64bit)，它被软件包 2:postfix-2.10.1-7.el7.x86_64 需要 --> 正在处理依赖关系 libmysqlclient.so.18(libmysqlclient_18)(64bit)，它被软件包 2:postfix-2.10.1-7.el7.x86_64 需要 --> 正在检查事务 ---> 软件包 postfix.x86_64.2.2.10.1-7.el7 将被 删除 --> 解决依赖关系完成 依赖关系解决 ========================================================================================================================= Package 架构 版本 源 大小 ========================================================================================================================= 正在删除: mariadb-libs x86_64 1:5.5.64-1.el7 @anaconda 4.4 M 为依赖而移除: postfix x86_64 2:2.10.1-7.el7 @anaconda 12 M 事务概要 ========================================================================================================================= 移除 1 软件包 (+1 依赖软件包) 安装大小：17 M 是否继续？[y/N]：y Downloading packages: Running transaction check Running transaction test Transaction test succeeded Running transaction 正在删除 : 2:postfix-2.10.1-7.el7.x86_64 1/2 正在删除 : 1:mariadb-libs-5.5.64-1.el7.x86_64 2/2 验证中 : 1:mariadb-libs-5.5.64-1.el7.x86_64 1/2 验证中 : 2:postfix-2.10.1-7.el7.x86_64 2/2 删除: mariadb-libs.x86_64 1:5.5.64-1.el7 作为依赖被删除: postfix.x86_64 2:2.10.1-7.el7 完毕！
4.开始安装
[root@localhost soft3]# rpm -ivh mysql-community-common-5.7.15-1.el7.x86_64.rpm
警告：mysql-community-common-5.7.15-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-common-5.7.15-1.e################################# [100%]
[root@localhost soft3]# rpm -ivh mysql-community-libs-5.7.15-1.el7.x86_64.rpm
警告：mysql-community-libs-5.7.15-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-libs-5.7.15-1.el7################################# [100%]
[root@localhost soft3]# rpm -ivh mysql-community-server-5.7.15-1.el7.x86_64.rpm
警告：mysql-community-server-5.7.15-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
错误：依赖检测失败：
mysql-community-client(x86-64) >= 5.7.9 被 mysql-community-server-5.7.15-1.el7.x86_64 需要
[root@localhost soft3]# rpm -ivh mysql-community-client-5.7.15-1.el7.x86_64.rpm
警告：mysql-community-client-5.7.15-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-client-5.7.15-1.e################################# [100%]
[root@localhost soft3]# rpm -ivh mysql-community-server-5.7.15-1.el7.x86_64.rpm
警告：mysql-community-server-5.7.15-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-server-5.7.15-1.e################################# [100%]
6.启动mysql报错
[root@localhost log]# systemctl start mysqld Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.
原因是 /var/lib/mysql /这个目标路径已经存在/var/lib/mysql /，导致无法初始化。
解决办法
[root@localhost mysql]# rm -rf /var/lib/mysql/
启动成功
[root@localhost mysql]# systemctl status mysqld ● mysqld.service - MySQL Server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled) Active: active (running) since 三 2022-05-04 21:28:04 CST; 53s ago Process: 40961 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS) Process: 40867 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS) Main PID: 40964 (mysqld) Tasks: 27 CGroup: /system.slice/mysqld.service └─40964 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid 5月 04 21:27:55 localhost.localdomain systemd[1]: Starting MySQL Server... 5月 04 21:28:04 localhost.localdomain systemd[1]: Started MySQL Server.
7.进入数据库修改密码
查看默认密码
[root@localhost lib]# cat /var/log/mysqld.log | grep password
进入数据库：
[root@localhost lib]# mysql -uroot -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 4 Server version: 5.7.15 Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. 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>
修改密码：
mysql> alter user root@'localhost' identified by 'Password@123'; Query OK, 0 rows affected (0.00 sec)
开通远程连接权限
mysql> mysql> grant all privileges on *root'@'%' identified by 'Password@123' with grant option; Query OK, 0 rows affected, 1 warning (0.00 sec)
刷新权限
mysql> flush privileges; Query OK, 0 rows affected (0.01 sec)
