CentOS 6 安裝 MySQL 8.0.+
阿新 • • 發佈：2018-12-10
1.先查詢是否安裝MySQL
大多數centos 6 自帶 MySQL5.1
命令：
rpm -qa|grep mysql執行：
[[email protected] ~]# rpm -qa|grep mysql
mysql-libs-5.1.73-7.el6.i6862.若有則解除安裝
rpm -e --nodeps mysql-libs--nodeps 是消除依賴的意思
3.去官網複製yum下載連結用wget下載到伺服器
https://dev.mysql.com/downloads/repo/yum/
命令：
wget https://dev.mysql.com/get/mysql80-community-release-el6-1.noarch.rpm
成功：
[[email protected] ~]# wget https://dev.mysql.com/get/mysql80-community-release-el6-1.noarch.rpm --2018-12-10 06:40:42-- ... Length: 25800 (25K) [application/x-redhat-package-manager] Saving to: “mysql80-community-release-el6-1.noarch.rpm” 2018-12-10 06:40:42 (95.8 MB/s) - “mysql80-community-release-el6-1.noarch.rpm” saved [25800/25800]
若沒有wget
[[email protected] ~]# wget https://dev.mysql.com/get/mysql80-community-release-el6-1.noarch.rpm
-bash: wget: command not found安裝wget
yum -y install wget4.安裝
第一步：
rpm -ivh mysql80-community-release-el6-1.noarch.rpm執行成功結果：
[[email protected] ~]# rpm -ivh mysql80-community-release-el6-1.noarch.rpm
warning: mysql80-community-release-el6-1.noarch.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ########################################### [100%]
1:mysql80-community-relea########################################### [100%]
[ 第二步：
yum install mysql-server執行後會跳出2次選擇，輸入y回車繼續即可，如：
[[email protected] ~]# yum install mysql-server
Loaded plugins: fastestmirror
...
Install 5 Package(s)
Total download size: 452 M
Installed size: 1.7 G
Is this ok [y/N]: y輸入y繼續安裝：
...
Total 16 MB/s | 452 MB 00:28
warning: rpmts_HdrFromFdno: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
Importing GPG key 0x5072E1F5:
Userid : MySQL Release Engineering <[email protected]>
Package: mysql80-community-release-el6-1.noarch (installed)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
Is this ok [y/N]: y最後出現如下指令，安裝成功：
Installed:
mysql-community-server.i686 0:8.0.13-1.el6
Dependency Installed:
mysql-community-client.i686 0:8.0.13-1.el6 mysql-community-common.i686 0:8.0.13-1.el6 mysql-community-libs.i686 0:8.0.13-1.el6 numactl.i686 0:2.0.9-2.el6
Complete!5.查詢是否安裝成功
[[email protected] ~]# mysqladmin -V
mysqladmin Ver 8.0.13 for Linux on i686 (MySQL Community Server - GPL)6.開啟MySqL
[[email protected] ~]# service mysqld start
Initializing MySQL database:
[ OK ]
Starting mysqld: [ OK ]檢視MySQL啟動狀態:
[[email protected] ~]# service mysqld status
mysqld (pid 3852) is running...7.檢視系統給root自動生成的密碼
cat /var/log/mysqld.log執行結果（密碼在第二行最後）：
[[email protected] ~]# cat /var/log/mysqld.log
2018-12-10T12:19:20.303739Z 0 [System] [MY-013169] [Server] /usr/sbin/mysqld (mysqld 8.0.13) initializing of server in progress as process 3620
2018-12-10T12:19:24.878215Z 5 [Note] [MY-010454] [Server] A temporary password is generated for [email protected]: >J9tXQXwK3y=
2018-12-10T12:19:29.237165Z 0 [System] [MY-013170] [Server] /usr/sbin/mysqld (mysqld 8.0.13) initializing of server has completed
2018-12-10T12:19:32.011310Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.13) starting as process 3852
2018-12-10T12:19:33.144590Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2018-12-10T12:19:33.201007Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.13' socket: '/var/lib/mysql/mysql.sock' port: 3306 MySQL Community Server - GPL.
2018-12-10T12:19:33.272837Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: '/var/run/mysqld/mysqlx.sock' bind-address: '::' port: 330608.命令列登入和修改密碼
[[email protected] ~]# mysql -uroot -p
Enter password: 輸入上一步驟檢視的密碼（輸入時不顯示任何字元）：
[[email protected] ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.
...
mysql> 修改密碼：
mySql5.7之後，必須修改密碼後才能操作.
並且對密碼要求嚴格，至少8位，包含大小寫等，若想設定成123456，則要以下兩條命令：
mysql> set global validate_password.policy=0;
Query OK, 0 rows affected (0.00 sec)
mysql> set global validate_password.length=1;
Query OK, 0 rows affected (0.00 sec)設定密碼：
mysql> alter user user() identified by '123456';
Query OK, 0 rows affected (0.09 sec)9.遠端登入（Navicat）
注意：需關閉防火牆或者開放3306埠
service iptables stop #暫時關閉
chkconfig iptables off #設定成開啟不自啟
==========
/sbin/iptables -I INPUT -p tcp --dport 3306 -j ACCEPT #開啟3306埠
/etc/rc.d/init.d/iptables save #儲存配置
/etc/rc.d/init.d/iptables restart #重啟服務 遠端登入會報如下錯誤：
首先檢視使用者表，發現登入主機是localhost，當然不能登入，把root使用者的localhost設定為%，這樣任意主機都可以連線。
mysql> use mysql;
Database changed
mysql> select user,host from user;
+------------------+-----------+
| user | host |
+------------------+-----------+
| mysql.infoschema | localhost |
| mysql.session | localhost |
| mysql.sys | localhost |
| root | localhost |
+------------------+-----------+
4 rows in set (0.00 sec)
mysql> update user set host = '%' where user ='root';再重新整理一下:
flush privileges;這時該問題已解決，若報如下錯誤，則是版本加密方式的改變
登入後請依次執行如下命令：
use mysql;
ALTER USER 'root'@'%' IDENTIFIED BY '123456' PASSWORD EXPIRE NEVER; #更改加密方式
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';#更新使用者密碼
FLUSH PRIVILEGES;#重新整理許可權再次連線成功：
