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MySQL 5.7安装、升级笔记分享：
卸载当前的 MySQL
查看当前 MySQL 版本：
[root@coderknock ~]# mysql -V mysql Ver 14.14 Distrib 5.1.73, for redhat-linux-gnu (i386) using readline 5.1
停止 MySQL 服务
[root@coderknock ~]# service mysqld stop Stopping mysqld: [ OK ]
备份数据【数据不重要可以忽略】
备份数据库，升级MySQL通常不会丢失数据，但保险起见，我们需要做这一步。输入命令：
[root@coderknock ~]# mysqldump -u xxx -h xxx -P 3306 -p --all-databases > databases.sql
卸载旧版本 MySQL
[root@coderknock ~]# yum remove mysql mysql-* Loaded plugins: security Setting up Remove Process Resolving Dependencies --> Running transaction check ---> Package mysql.i686 0:5.1.73-7.el6 will be erased ---> Package mysql-libs.i686 0:5.1.73-7.el6 will be erased --> Processing Dependency: libmysqlclient.so.16 for package: 2:postfix-2.6.6-6.el6_7.1.i686 --> Processing Dependency: libmysqlclient.so.16 for package: perl-DBD-MySQL-4.013-3.el6.i686 --> Processing Dependency: libmysqlclient.so.16(libmysqlclient_16) for package: 2:postfix-2.6.6-6.el6_7.1.i686 --> Processing Dependency: libmysqlclient.so.16(libmysqlclient_16) for package: perl-DBD-MySQL-4.013-3.el6.i686 --> Processing Dependency: mysql-libs for package: 2:postfix-2.6.6-6.el6_7.1.i686 ---> Package mysql-server.i686 0:5.1.73-7.el6 will be erased --> Running transaction check ---> Package perl-DBD-MySQL.i686 0:4.013-3.el6 will be erased ---> Package postfix.i686 2:2.6.6-6.el6_7.1 will be erased --> Processing Dependency: /usr/sbin/sendmail for package: cronie-1.4.4-16.el6_8.2.i686 --> Processing Dependency: /usr/sbin/sendmail for package: redhat-lsb-core-4.0-7.el6.centos.i686 --> Running transaction check ---> Package cronie.i686 0:1.4.4-16.el6_8.2 will be erased --> Processing Dependency: cronie = 1.4.4-16.el6_8.2 for package: cronie-anacron-1.4.4-16.el6_8.2.i686 ---> Package redhat-lsb-core.i686 0:4.0-7.el6.centos will be erased --> Running transaction check ---> Package cronie-anacron.i686 0:1.4.4-16.el6_8.2 will be erased --> Processing Dependency: /etc/cron.d for package: crontabs-1.10-33.el6.noarch --> Processing Dependency: /etc/cron.d for package: sysstat-9.0.4-31.el6.i686 --> Restarting Dependency Resolution with new changes. --> Running transaction check ---> Package crontabs.noarch 0:1.10-33.el6 will be erased ---> Package sysstat.i686 0:9.0.4-31.el6 will be erased --> Finished Dependency Resolution Dependencies Resolved ======================================================================================================================================================================================================= Package Arch Version Repository Size ======================================================================================================================================================================================================= Removing: mysql i686 5.1.73-7.el6 @base 2.3 M mysql-libs i686 5.1.73-7.el6 @base 3.9 M mysql-server i686 5.1.73-7.el6 @base 24 M Removing for dependencies: cronie i686 1.4.4-16.el6_8.2 @updates 169 k cronie-anacron i686 1.4.4-16.el6_8.2 @updates 38 k crontabs noarch 1.10-33.el6 @anaconda-CentOS-201311291201.i386/6.5 2.4 k perl-DBD-MySQL i686 4.013-3.el6 @base 341 k postfix i686 2:2.6.6-6.el6_7.1 @base 9.3 M redhat-lsb-core i686 4.0-7.el6.centos @anaconda-CentOS-201311291201.i386/6.5 22 k sysstat i686 9.0.4-31.el6 @base 804 k Transaction Summary ======================================================================================================================================================================================================= Remove 10 Package(s) Installed size: 41 M Is this ok [y/N]: y Downloading Packages: Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Erasing : mysql-server-5.1.73-7.el6.i686 1/10 warning: /var/log/mysqld.log saved as /var/log/mysqld.log.rpmsave Erasing : redhat-lsb-core-4.0-7.el6.centos.i686 2/10 /var/tmp/rpm-tmp.Y5QGjy: line 1: lsb_release: command not found Erasing : mysql-5.1.73-7.el6.i686 3/10 Erasing : perl-DBD-MySQL-4.013-3.el6.i686 4/10 Erasing : sysstat-9.0.4-31.el6.i686 5/10 Erasing : crontabs-1.10-33.el6.noarch 6/10 Erasing : cronie-anacron-1.4.4-16.el6_8.2.i686 7/10 Erasing : cronie-1.4.4-16.el6_8.2.i686 8/10 Erasing : 2:postfix-2.6.6-6.el6_7.1.i686 9/10 Erasing : mysql-libs-5.1.73-7.el6.i686 10/10 Verifying : redhat-lsb-core-4.0-7.el6.centos.i686 1/10 Verifying : perl-DBD-MySQL-4.013-3.el6.i686 2/10 Verifying : mysql-server-5.1.73-7.el6.i686 3/10 Verifying : crontabs-1.10-33.el6.noarch 4/10 Verifying : sysstat-9.0.4-31.el6.i686 5/10 Verifying : cronie-anacron-1.4.4-16.el6_8.2.i686 6/10 Verifying : cronie-1.4.4-16.el6_8.2.i686 7/10 Verifying : mysql-libs-5.1.73-7.el6.i686 8/10 Verifying : mysql-5.1.73-7.el6.i686 9/10 Verifying : 2:postfix-2.6.6-6.el6_7.1.i686 10/10 Removed: mysql.i686 0:5.1.73-7.el6 mysql-libs.i686 0:5.1.73-7.el6 mysql-server.i686 0:5.1.73-7.el6 Dependency Removed: cronie.i686 0:1.4.4-16.el6_8.2 cronie-anacron.i686 0:1.4.4-16.el6_8.2 crontabs.noarch 0:1.10-33.el6 perl-DBD-MySQL.i686 0:4.013-3.el6 postfix.i686 2:2.6.6-6.el6_7.1 redhat-lsb-core.i686 0:4.0-7.el6.centos sysstat.i686 0:9.0.4-31.el6 Complete!
这样就卸载完成了，为了保险起见我们检查一下系统中是否还有 MySQL 相关内容没有删除干净
[root@coderknock ~]# yum list installed | grep mysql [root@coderknock ~]#
上面的情况是没有未删除部分，如果有的话可通过下面的命令删除：
[root@coderknock ~]# yum remove mysql－libs
下载最新版本的 MySQL
查看系统配置信息选择对应 MySQL 包
[root@coderknock ~]# uname -r 3.10.104-1.el6.elrepo.i686
在浏览器打开 sohu提供的MySQL 镜像（官网速度太慢）
然后根据自己系统配置选择对应的 rpm 包，右键复制文件链接，我的选择如下：
下载并解压
[root@coderknock ~]# wget http://mirrors.sohu.com/mysql/MySQL-5.7/mysql-5.7.17-1.el6.i686.rpm-bundle.tar --2017-01-06 22:46:15-- http://mirrors.sohu.com/mysql/MySQL-5.7/mysql-5.7.17-1.el6.i686.rpm-bundle.tar Resolving mirrors.sohu.com... 119.188.36.70 Connecting to mirrors.sohu.com|119.188.36.70|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 448163840 (427M) [application/octet-stream] Saving to: “mysql-5.7.17-1.el6.i686.rpm-bundle.tar” 100%[=============================================================================================================================================================>] 448,163,840 9.98M/s in 45s 2017-01-06 22:47:00 (9.54 MB/s) - “mysql-5.7.17-1.el6.i686.rpm-bundle.tar” saved [448163840/448163840] [root@coderknock ~]# tar xvf mysql-5.7.17-1.el6.i686.rpm-bundle.tar mysql-community-libs-compat-5.7.17-1.el6.i686.rpm mysql-community-client-5.7.17-1.el6.i686.rpm mysql-community-embedded-devel-5.7.17-1.el6.i686.rpm mysql-community-devel-5.7.17-1.el6.i686.rpm mysql-community-common-5.7.17-1.el6.i686.rpm mysql-community-test-5.7.17-1.el6.i686.rpm mysql-community-embedded-5.7.17-1.el6.i686.rpm mysql-community-libs-5.7.17-1.el6.i686.rpm mysql-community-server-5.7.17-1.el6.i686.rpm
安装及配置
安装 rpm 【有依赖关系，请按下面的步骤安装，搜索 [root@coderknock ~]# 可跳过安装日志直接查看相关命令】
[root@coderknock ~]# yum localinstall mysql-community-common-5.7.17-1.el6.i686.rpm Loaded plugins: security Setting up Local Package Process Examining mysql-community-common-5.7.17-1.el6.i686.rpm: mysql-community-common-5.7.17-1.el6.i686 Marking mysql-community-common-5.7.17-1.el6.i686.rpm to be installed Resolving Dependencies --> Running transaction check ---> Package mysql-community-common.i686 0:5.7.17-1.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ======================================================================================================================================================================================================= Package Arch Version Repository Size ======================================================================================================================================================================================================= Installing: mysql-community-common i686 5.7.17-1.el6 /mysql-community-common-5.7.17-1.el6.i686 2.5 M Transaction Summary ======================================================================================================================================================================================================= Install 1 Package(s) Total size: 2.5 M Installed size: 2.5 M Is this ok [y/N]: y Downloading Packages: Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : mysql-community-common-5.7.17-1.el6.i686 1/1 Verifying : mysql-community-common-5.7.17-1.el6.i686 1/1 Installed: mysql-community-common.i686 0:5.7.17-1.el6 Complete! [root@coderknock ~]# yum localinstall mysql-community-libs-5.7.17-1.el6.i686.rpm Loaded plugins: security Setting up Local Package Process Examining mysql-community-libs-5.7.17-1.el6.i686.rpm: mysql-community-libs-5.7.17-1.el6.i686 Marking mysql-community-libs-5.7.17-1.el6.i686.rpm to be installed Resolving Dependencies --> Running transaction check ---> Package mysql-community-libs.i686 0:5.7.17-1.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ======================================================================================================================================================================================================= Package Arch Version Repository Size ======================================================================================================================================================================================================= Installing: mysql-community-libs i686 5.7.17-1.el6 /mysql-community-libs-5.7.17-1.el6.i686 7.8 M Transaction Summary ======================================================================================================================================================================================================= Install 1 Package(s) Total size: 7.8 M Installed size: 7.8 M Is this ok [y/N]: y Downloading Packages: Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : mysql-community-libs-5.7.17-1.el6.i686 1/1 Verifying : mysql-community-libs-5.7.17-1.el6.i686 1/1 Installed: mysql-community-libs.i686 0:5.7.17-1.el6 Complete! [root@coderknock ~]# yum localinstall mysql-community-client-5.7.17-1.el6.i686.rpm Loaded plugins: security Setting up Local Package Process Examining mysql-community-client-5.7.17-1.el6.i686.rpm: mysql-community-client-5.7.17-1.el6.i686 Marking mysql-community-client-5.7.17-1.el6.i686.rpm to be installed Resolving Dependencies --> Running transaction check ---> Package mysql-community-client.i686 0:5.7.17-1.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ======================================================================================================================================================================================================= Package Arch Version Repository Size ======================================================================================================================================================================================================= Installing: mysql-community-client i686 5.7.17-1.el6 /mysql-community-client-5.7.17-1.el6.i686 87 M Transaction Summary ======================================================================================================================================================================================================= Install 1 Package(s) Total size: 87 M Installed size: 87 M Is this ok [y/N]: ^[[A^Hy Is this ok [y/N]: y Downloading Packages: Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : mysql-community-client-5.7.17-1.el6.i686 1/1 Verifying : mysql-community-client-5.7.17-1.el6.i686 1/1 Installed: mysql-community-client.i686 0:5.7.17-1.el6 Complete! [root@coderknock ~]# yum localinstall mysql-community-server-5.7.17-1.el6.i686.rpm Loaded plugins: security Setting up Local Package Process Examining mysql-community-server-5.7.17-1.el6.i686.rpm: mysql-community-server-5.7.17-1.el6.i686 Marking mysql-community-server-5.7.17-1.el6.i686.rpm to be installed Resolving Dependencies --> Running transaction check ---> Package mysql-community-server.i686 0:5.7.17-1.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ======================================================================================================================================================================================================= Package Arch Version Repository Size ======================================================================================================================================================================================================= Installing: mysql-community-server i686 5.7.17-1.el6 /mysql-community-server-5.7.17-1.el6.i686 695 M Transaction Summary ======================================================================================================================================================================================================= Install 1 Package(s) Total size: 695 M Installed size: 695 M Is this ok [y/N]: y Downloading Packages: Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : mysql-community-server-5.7.17-1.el6.i686 1/1 Verifying : mysql-community-server-5.7.17-1.el6.i686 1/1 Installed: mysql-community-server.i686 0:5.7.17-1.el6 Complete!
配置
查看版本
[root@coderknock ~]# mysql -V mysql Ver 14.14 Distrib 5.7.17, for Linux (i686) using EditLine wrapper
启动 MySQL
[root@coderknock ~]# service mysqld start MySQL Daemon failed to start. Starting mysqld: [FAILED]
上面的情况说明启动失败，这是因为经过上面的步骤，MySQL 最新版已经安装到我们的系统了，但这是还没有初始化数据，所以导致无法启动。
初始化数据库
[root@coderknock ~]# mysqld --initialize
如果遇到错误如下：
2017-01-06T14:53:08.889803Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-01-06T14:53:08.892190Z 0 [ERROR] --initialize specified but the data directory has files in it. Aborting.
2017-01-06T14:53:08.892475Z 0 [ERROR] Aborting
可以运行以下命令【无需再执行 mysqld --initialize】：
[root@coderknock ~]# rm -rf /var/lib/mysql [root@coderknock ~]# service mysqld start Initializing MySQL database: [ OK ] Installing validate password plugin: [ OK ] Starting mysqld: [ OK ]
这样我们就启动了 MySQL 服务
MySQL 无法登陆的解决办法
登录时我遇到了一些问题：
[root@coderknock ~]# mysql -u root -p Enter password: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
这是因较新版本的 MySQL 因为安全的考虑，会设置默认密码
[root@coderknock ~]# grep 'temporary password' /var/log/mysqld.log 2017-01-06T14:53:33.490540Z 1 [Note] A temporary password is generated for root@localhost: Ei(GLix_p6/1
这样就找到了密码，如果上面方法不可行可以看看是否有 /root/.mysql_secret 文件
或者通过以下方法直接修改密码：
[root@coderknock ~]# service mysqld stop
Stopping mysqld: [ OK ]
[root@coderknock ~]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
[1] 14208
[root@coderknock ~]# 2017-01-06T15:02:18.663496Z mysqld_safe Logging to '/var/log/mysqld.log'.
2017-01-06T15:02:18.666764Z mysqld_safe Logging to '/var/log/mysqld.log'.
2017-01-06T15:02:18.693025Z mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
^C
[root@coderknock ~]# mysql -u root mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.17 MySQL Community Server (GPL)
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>update mysql.user set authentication_string=password('你的密码.') where User='root';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 1
mysql> flush privileges;
mysql> update mysql.user set Host='%' where User='root'
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 1
mysql> flush privileges;
注意SQL在Linux下要注意大小写，执行之后Query OK, 1 row affected, 1 warning (0.00 sec)，row 之前是1才代表执行成功了。update mysql.user set Host='%' where User='root' 这句是为了别的 IP 的机器也可以登录我们的MySQL，可以按需执行
重置密码
无论是获取到了默认密码还是强行修改了密码。新版 MySQL 在第一次通过密码登录后会无法执行SQL：
mysql> select host from mysql.user where User='root'; ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
这是因为 MySQL 为了安全会要求修改初始密码。
mysql> ALTER USER 'root'@'%' IDENTIFIED BY '你的密码';
如果遇到ERROR 1819 (HY000): Your password does not satisfy the current policy requirements说明你的密码太简单，需要设置复杂点的密码，有大小写字母、有数字、有标点基本上就可以通过。
注意，如果你没有修改过 root 用户的Host或者修改为非 % 的字符，需要对上面的语句进行对应的修改，例如： ALTER USER ‘root'@'localhost' IDENTIFIED BY ‘你的密码'
如果遇到ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement 则需要退出安全模式，正常启动MySQL后登陆再进行以上操作：
mysql> quit [root@coderknock ~]# ps -ef|grep mysql root 14208 12686 0 23:02 pts/0 00:00:00 /bin/sh /usr/bin/mysqld_safe --user=mysql --skip-grant-tables --skip-networking mysql 14381 14208 0 23:02 pts/0 00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --skip-grant-tables --skip-networking --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock root 15148 12686 0 23:23 pts/0 00:00:00 grep mysql [root@coderknock ~]# kill -9 114208 -bash: kill: (114208) - No such process [root@coderknock ~]# kill -9 14208 [1]+ Killed mysqld_safe --user=mysql --skip-grant-tables --skip-networking [root@coderknock ~]# kill -9 1438 [root@coderknock ~]# service mysqld start [root@coderknock ~]# mysql -u root mysql
精彩专题分享：mysql不同版本安装教程 mysql5.7各版本安装教程
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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Centos,mysql5.7
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一口气升级7个大模型SaaS应用，百度智能云：突出一个“开箱即用” - 2024/12/24
这一波大模型产业落地浪潮里，不少企业其实处在 “干瞪眼“的状态。
一种情况是，很多大模型产品看得见却摸不着，在台上一个个遥遥领先——今天Sora技精四座，明天英伟达的机器人又赢得满堂彩，可是到了台下一问：啥时候能用上啊？答曰：遥遥无期。
另一种情况是，企业想用上大模型，却又难免瞻前顾后——既要考虑场景融合，又得兼顾安全性，还要考虑打通现有系统，再加上各种部署成本和繁琐的采购流程……最后只能拂袖：罢了，再等等吧。
这一波大模型产业落地浪潮里，不少企业其实处在 “干瞪眼“的状态。
一种情况是，很多大模型产品看得见却摸不着，在台上一个个遥遥领先——今天Sora技精四座，明天英伟达的机器人又赢得满堂彩，可是到了台下一问：啥时候能用上啊？答曰：遥遥无期。
另一种情况是，企业想用上大模型，却又难免瞻前顾后——既要考虑场景融合，又得兼顾安全性，还要考虑打通现有系统，再加上各种部署成本和繁琐的采购流程……最后只能拂袖：罢了，再等等吧。
稳了！魔兽国服回归的3条重磅消息！官宣时间再确认！
昨天有一位朋友在大神群里分享，自己亚服账号被封号之后居然弹出了国服的封号信息对话框。
这里面让他访问的是一个国服的战网网址，com.cn和后面的zh都非常明白地表明这就是国服战网。
而他在复制这个网址并且进行登录之后，确实是网易的网址，也就是我们熟悉的停服之后国服发布的暴雪游戏产品运营到期开放退款的说明。这是一件比较奇怪的事情，因为以前都没有出现这样的情况，现在突然提示跳转到国服战网的网址，是不是说明了简体中文客户端已经开始进行更新了呢？