最近重新安装了下操作系统和虚拟机，需要在Linux centos安装mysql，记录下安装过程。
Linux centos7安装mysql8
第一步下载安装包
直接下载或者在线下载
1.1直接下载
Mysql官网：https://dev.mysql.com/downloads/repo/yum/
选择Red Hat Enterprise Linux 7 / Oracle Linux 7，点击Download下载
mysql80-community-release-el7-3.noarch.rpm
1.2在线下载rpm包
wget http://repo.mysql.com/mysql80-community-release-el7-3.noarch.rpm
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[root@linuxprobe devTools]# wget http://repo.mysql.com/mysql80-community-release-el7-3.noarch.rpm
--2020-03-20 12:14:53-- http://repo.mysql.com/mysql80-community-release-el7-3.noarch.rpm
Resolving repo.mysql.com (repo.mysql.com)... 72.246.33.49
Connecting to repo.mysql.com (repo.mysql.com)|72.246.33.49|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://103.238.48.8/repo.mysql.com/mysql80-community-release-el7-3.noarch.rpm [following]
--2020-03-20 12:14:53-- http://103.238.48.8/repo.mysql.com/mysql80-community-release-el7-3.noarch.rpm
Connecting to 103.238.48.8:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 26024 (25K) [application/x-redhat-package-manager]
Saving to: ‘mysql80-community-release-el7-3.noarch.rpm’
100%[========================================================================================================================>] 26,024 --.-K/s in 0.1s
2020-03-20 12:14:54 (259 KB/s) - ‘mysql80-community-release-el7-3.noarch.rpm’ saved [26024/26024]
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第二步：安装rpm包
sudo rpm -Uvh mysql80-community-release-el7-3.noarch.rpm
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[root@linuxprobe devTools]# sudo rpm -Uvh mysql80-community-release-el7-3.noarch.rpm
warning: mysql80-community-release-el7-3.noarch.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ################################# [100%]
Updating / installing...
1:mysql80-community-release-el7-3 ################################# [100%]
------------------------------------------
第三步： yum安装mysql
yum install mysql-community-server -y
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| [root@linuxprobe devTools]# yum install -y mysql-community-server base | 3.6 kB 00:00:00 extras | 2.9 kB 00:00:00 mysql-connectors-community | 2.5 kB 00:00:00 mysql-tools-community | 2.5 kB 00:00:00 mysql80-community | 2.5 kB 00:00:00 updates | 2.9 kB 00:00:00 Resolving Dependencies ------------------------------- Installed: mysql-community-libs.x86_64 0:8.0.19-1.el7 mysql-community-libs-compat.x86_64 0:8.0.19-1.el7 mysql-community-server.x86_64 0:8.0.19-1.el7
Dependency Installed: mysql-community-client.x86_64 0:8.0.19-1.el7 mysql-community-common.x86_64 0:8.0.19-1.el7
Dependency Updated: postfix.x86_64 2:2.10.1-7.el7
Replaced: mariadb-libs.x86_64 1:5.5.56-2.el7
Complete! |
第五步：查看mysql安装后的文件
[root@linuxprobe devTools]# rpm -qa | grep mysql
mysql80-community-release-el7-3.noarch
mysql-community-libs-compat-8.0.19-1.el7.x86_64
mysql-community-client-8.0.19-1.el7.x86_64
mysql-community-common-8.0.19-1.el7.x86_64
mysql-community-server-8.0.19-1.el7.x86_64
mysql-community-libs-8.0.19-1.el7.x86_64
第六步：启动mysql：
[root@linuxprobe devTools]# service mysqld start
Redirecting to /bin/systemctl start mysqld.service
查看mysql状态
[root@linuxprobe devTools]# service mysqld status
Redirecting to /bin/systemctl status mysqld.service
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since Fri 2020-03-20 22:09:20 CST; 2min 0s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Process: 7435 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
Main PID: 7524 (mysqld)
Status: "Server is operational"
Tasks: 38
CGroup: /system.slice/mysqld.service
└─7524 /usr/sbin/mysqld
Mar 20 22:08:55 linuxprobe.com systemd[1]: Starting MySQL Server...
Mar 20 22:09:20 linuxprobe.com systemd[1]: Started MySQL Server.
找初始密码：
[root@linuxprobe devTools]# grep 'temporary password' /var/log/mysqld.log
2020-03-20T14:09:15.495095Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: sGk(EQ0Chgbg
登陆并修改密码：
[root@linuxprobe devTools]# mysql -uroot -p sGk(EQ0Chgbg
bash: syntax error near unexpected token `('
---->linux5.0之后，是不能带有括号的，这个时候就需要转译.
#mysql -uroot -psGk\(EQ0Chgbg
或者#mysql -uroot -p"sGk(EQ0Chgbg"
| mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 15 Server version: 8.0.19
Copyright (c) 2000, 2020, 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. |
修改原始密码：
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'Hu12345@';
Query OK, 0 rows affected (0.04 sec)
备注：密码规则：8位以上，大小写字母、数字和特殊字母。
创建数据库例子：
| mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | sys | +--------------------+ 4 rows in set (0.03 sec) mysql> create database mysqltest; Query OK, 1 row affected (0.01 sec) mysql> use mysqltest; Database changed mysql> show tables ; Empty set (0.00 sec) |
重启mysql使用新密码登陆
#service mysqld restart
[root@linuxprobe devTools]# service mysqld restart
Redirecting to /bin/systemctl restart mysqld.service
其他操作：
1.如已经安装过，需要卸载，并且删除卸载残留
- 查找mysql
#rpm -qa | grep mysql
- #find / -name mysql
[root@linuxprobe devTools]# find / -name mysql
find: ‘/run/user/1000/gvfs’: Permission denied
/etc/selinux/targeted/active/modules/100/mysql
/usr/share/mysql
看到还有的，需要用rm -rf删除掉，配置文件/etc/my.cnf也需要删除。
2.遇到问题：
| 问题1：使用yum install -y mysql-community-server命令时，提示Loaded plugins: fastestmirror, langpacks [root@linuxprobe /]# yum install -y mysql-community-server Loaded plugins: fastestmirror, langpacks 解决方法： [root@linuxprobe /]# vim /etc/yum/pluginconf.d/fastestmirror.conf --->enabled = 0//由1改为0，禁用该插件 [root@linuxprobe /]# vim /etc/yum.conf --->plugins= 0//改为0，不使用插件 编辑保存操作：键盘输入i，修改后，键盘点击esc，:wq保存退出；:q退出。 |
||
| 问题2：Linux centos7安装MySQL8.0出现[Errno 256] No more mirrors to try
解决办法如下： 1.yum clean all #清除仓库缓存 2.yum makecache #将服务器包信息缓存到本地
然后再执行yum install mysql-community-server -y |
3.其他mysql命令
1.需要重装mysql时，删除mysql数据库
#yum安装的mysql,需要删除，使用命令:
#yum -y remove mysql*
# 需要将/var/lib/mysql文件夹下的所有文件都删除干净
# 然后在重新执行上面的安装步骤
2.其他查看安装包命令
2.1.查看有没有安装包:
yum list mysql*
#移除已经安装的mysql
yum remove mysql mysql-server
rm -rf /var/lib/mysql
rm -rf /etc/my.cnf
2.2. 查看是否还有mysql软件:
rpm -qa|grep mysql
#如果有的话,继续删除
2.3.安装mysql
yum install mysql-server
4.启动&&停止命令
4.1. 启动mysql服务
#service mysqld start
#或者下面这个
#/etc/init.d/mysqld start
5.登录 mysql
#mysql -u root -p
6.授权后一定记得执行
| mysql>flush privileges ; |
参考：https://www.cnblogs.com/wuxun1997/p/10807466.html
