1检查是否已经安装mysql ,指令：
rpm -qa | grep MySQL
rpm -qa | grep mysql
[root@mysql2 ~]# rpm -qa | grep MySQL
MySQL-python-1.2.3-0.3.c1.1.el6.x86_64
[root@mysql2 ~]# rpm -qa | grep mysql
mysql-libs-5.1.71-1.el6.x86_64
mysql-5.1.71-1.el6.x86_64
mysql-connector-odbc-5.1.5r1144-7.el6.x86_64
删除指令：rpm -e name
[root@mysql2 ~]# rpm -e MySQL-python-1.2.3-0.3.c1.1.el6.x86_64
其他的也删除，上面只是举个例子。
查看系统mysql的版本
[root@mysql2 ~]# yum list mysql*
Loaded plugins: fastestmirror, security
Determining fastest mirrors
* base: mirrors.tuna.tsinghua.edu.cn
* extras: mirrors.tuna.tsinghua.edu.cn
* updates: mirrors.tuna.tsinghua.edu.cn
base | 3.7 kB 00:00
base/primary_db | 4.7 MB 00:02
extras | 3.4 kB 00:00
extras/primary_db | 27 kB 00:00
updates | 3.4 kB 00:00
updates/primary_db | 2.4 MB 00:01
Installed Packages
mysql.x86_64 5.1.71-1.el6 @anaconda-CentOS-201311272149.x86_64/6.5
mysql-connector-odbc.x86_64 5.1.5r1144-7.el6 @anaconda-CentOS-201311272149.x86_64/6.5
mysql-libs.x86_64 5.1.71-1.el6 @anaconda-CentOS-201311272149.x86_64/6.5
Available Packages
MySQL-python.x86_64 1.2.3-0.3.c1.1.el6 base
mysql.x86_64 5.1.73-8.el6_8 base
mysql-bench.x86_64 5.1.73-8.el6_8 base
mysql-connector-java.noarch 1:5.1.17-6.el6 base
mysql-devel.i686 5.1.73-8.el6_8 base
mysql-devel.x86_64 5.1.73-8.el6_8 base
mysql-embedded.i686 5.1.73-8.el6_8 base
mysql-embedded.x86_64 5.1.73-8.el6_8 base
mysql-embedded-devel.i686 5.1.73-8.el6_8 base
mysql-embedded-devel.x86_64 5.1.73-8.el6_8 base
mysql-libs.i686 5.1.73-8.el6_8 base
mysql-libs.x86_64 5.1.73-8.el6_8 base
mysql-server.x86_64 5.1.73-8.el6_8 base
mysql-test.x86_64
查看以后发现版本过低
2 yum安装mysql最新版本
下载指令：
wget http://dev.mysql.com/get/mysql57-community-release-el6-7.noarch.rpm
[root@mysql2 ~]# wget http://dev.mysql.com/get/mysql57-community-release-el6-7.noarch.rpm
--2018-12-21 19:23:56-- http://dev.mysql.com/get/mysql57-community-release-el6-7.noarch.rpm%C2%A0
Resolving dev.mysql.com... 137.254.60.11
Connecting to dev.mysql.com|137.254.60.11|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://dev.mysql.com/get/mysql57-community-release-el6-7.noarch.rpm%C2%A0 [following]
--2018-12-21 19:24:05-- https://dev.mysql.com/get/mysql57-community-release-el6-7.noarch.rpm%C2%A0
Connecting to dev.mysql.com|137.254.60.11|:443... connected.
ERROR: certificate common name “www.mysql.com” doesn’t match requested host name “dev.mysql.com”.
To connect to dev.mysql.com insecurely, use ‘--no-check-certificate’.
发现不行，更改指令：wget --no-check-certificate http://dev.mysql.com/get/mysql57-community-release-el6-7.noarch.rpm
[root@mysql2 ~]# wget --no-check-certificate http://dev.mysql.com/get/mysql57-community-release-el6-7.noarch.rpm
--2018-12-21 19:43:56-- http://dev.mysql.com/get/mysql57-community-release-el6-7.noarch.rpm
Resolving dev.mysql.com... 137.254.60.11
Connecting to dev.mysql.com|137.254.60.11|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://dev.mysql.com/get/mysql57-community-release-el6-7.noarch.rpm [following]
--2018-12-21 19:44:05-- https://dev.mysql.com/get/mysql57-community-release-el6-7.noarch.rpm
Connecting to dev.mysql.com|137.254.60.11|:443... connected.
WARNING: certificate common name “www.mysql.com” doesn’t match requested host name “dev.mysql.com”.
HTTP request sent, awaiting response... 302 Found
Location: https://repo.mysql.com//mysql57-community-release-el6-7.noarch.rpm [following]
--2018-12-21 19:44:06-- https://repo.mysql.com//mysql57-community-release-el6-7.noarch.rpm
Resolving repo.mysql.com... 104.77.36.72
Connecting to repo.mysql.com|104.77.36.72|:443... connected.
WARNING: certificate common name “cdn.mysql.com” doesn’t match requested host name “repo.mysql.com”.
HTTP request sent, awaiting response... 200 OK
Length: 8848 (8.6K) [application/x-redhat-package-manager]
Saving to: “mysql57-community-release-el6-7.noarch.rpm”
100%[=====================================================================================================================================================>] 8,848 --.-K/s in 0.005s
2018-12-21 19:44:15 (1.59 MB/s) - “mysql57-community-release-el6-7.noarch.rpm” saved [8848/8848]
[root@mysql2 ~]# ls
anaconda-ks.cfg install.log install.log.syslog mysql57-community-release-el6-7.noarch.rpm
可以，通过 ls 查看可以看到
安装下载的mysql仓库
[root@mysql2 ~]# rpm -ivh mysql57-community-release-el6-7.noarch.rpm
warning: mysql57-community-release-el6-7.noarch.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ########################################### [100%]
1:mysql57-community-relea########################################### [100%]
查看源的启用情况
[root@mysql2 ~]# yum repolist enabled
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
* base: mirrors.tuna.tsinghua.edu.cn
* extras: mirrors.tuna.tsinghua.edu.cn
* updates: mirrors.tuna.tsinghua.edu.cn
mysql-connectors-community | 2.5 kB 00:00
mysql-connectors-community/primary_db | 27 kB 00:00
mysql-tools-community | 2.5 kB 00:00
mysql-tools-community/primary_db | 45 kB 00:00
mysql57-community | 2.5 kB 00:00
mysql57-community/primary_db | 164 kB 00:00
repo id repo name status
base CentOS-6 - Base 6,713
extras CentOS-6 - Extras 35
mysql-connectors-community MySQL Connectors Community 66
mysql-tools-community MySQL Tools Community 68
mysql57-community MySQL 5.7 Community Server 291
updates CentOS-6 - Updates 255
repolist: 7,428
看见 MySQL 5.7 Community Server 就可以
查看下现在mysql的版本 yum list mysql-community*
[root@mysql2 ~]# yum list mysql-community*
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
* base: mirrors.tuna.tsinghua.edu.cn
* extras: mirrors.tuna.tsinghua.edu.cn
* updates: mirrors.tuna.tsinghua.edu.cn
Available Packages
mysql-community-client.i686 5.7.24-1.el6 mysql57-community
mysql-community-client.x86_64 5.7.24-1.el6 mysql57-community
mysql-community-common.i686 5.7.24-1.el6 mysql57-community
mysql-community-common.x86_64 5.7.24-1.el6 mysql57-community
mysql-community-devel.i686 5.7.24-1.el6 mysql57-community
mysql-community-devel.x86_64 5.7.24-1.el6 mysql57-community
mysql-community-embedded.i686 5.7.24-1.el6 mysql57-community
mysql-community-embedded.x86_64 5.7.24-1.el6 mysql57-community
mysql-community-embedded-devel.i686 5.7.24-1.el6 mysql57-community
mysql-community-embedded-devel.x86_64 5.7.24-1.el6 mysql57-community
mysql-community-libs.i686 5.7.24-1.el6 mysql57-community
mysql-community-libs.x86_64 5.7.24-1.el6 mysql57-community
mysql-community-libs-compat.i686 5.7.24-1.el6 mysql57-community
mysql-community-libs-compat.x86_64 5.7.24-1.el6 mysql57-community
mysql-community-release.noarch el6-7 mysql57-community
mysql-community-server.x86_64 5.7.24-1.el6 mysql57-community
mysql-community-test.x86_64 5.7.24-1.el6 mysql57-community
[root@mysql2 ~]#
5.7.24应该是最新版，5.7的优势很大
安装mysql5.7.24
yum -y install mysql-server
查看安装情况
[root@mysql2 ~]# rpm -qa | grep mysql
mysql-community-libs-compat-5.7.24-1.el6.x86_64
mysql57-community-release-el6-7.noarch
mysql-community-common-5.7.24-1.el6.x86_64
mysql-community-client-5.7.24-1.el6.x86_64
mysql-connector-odbc-8.0.13-1.el6.x86_64
mysql-community-libs-5.7.24-1.el6.x86_64
mysql-community-server-5.7.24-1.el6.x86_64
启动：
[root@mysql2 ~]# service mysqld start
Initializing MySQL database: [FAILED]
[root@mysql2 ~]# service mysqld start
Starting mysqld: [ OK ]
设置开机启动
chkconfig mysqld on
mysql安装成功后创建的超级用户'root'@'localhost'的密码会被存储在/var/log/mysqld.log，可以使用如下命令查看密码
grep 'temporary password' /var/log/mysqld.log
[root@mysql2 ~]# grep 'temporary password' /var/log/mysqld.log
2018-12-21T12:55:02.548184Z 1 [Note] A temporary password is generated for root@localhost: #5o4gtm%H#wS
#5o4gtm%H#wS 这个是我的初始密码
使用mysql生成的'root'@'localhost'用户和密码登录数据库，并修改 其密码，具体命令
[
root@mysql2 ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.24
Copyright (c) 2000, 2018, 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> ALTER USER 'root'@'localhost' IDENTIFIED BY 'root';
Query OK, 0 rows affected (0.00 sec)
创建用户，允许远程接入：
mysql> grant all on *.* to test@"%" Identified by "test";
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)
mysql>
开通3306端口，就可以远程接入了。
重启mysql服务:
service mysqld restart
#关闭服务
service mysqld stop
启动成功后执行netstat -tunlp|grep 3306就可以看到mysqld已经启动了3306端口的监听。
[root@localhost ~]# netstat -tunlp|grep 3306
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 2094/mysqld
附: 几个配置问题
大功告成！
---------------------
作者：tanlongkui
来源：CSDN
原文：https://blog.csdn.net/tanlongkui/article/details/85158934
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