CentOS7版本如何安装Mysql8.0.20版本数据库

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CentOS7安装Mysql8.0.20步骤：

https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-20.html

官网下载有时速度比较慢，直接点击链接也可以下载：mysql 8.0.20

官网下载8.0.20Mysql包（bundle版本）

1.创建mysql文件夹：

[root@localhost ~]# mkdir /usr/local/mysql[root@localhost ~]# cd /usr/local/mysql/

将下载的mysql包放在创建的MySQL文件夹内：

[root@localhost mysql]# ll总用量 815000-rw-r--r--. 1 root root 834560000 5月 13 10:44 mysql-8.0.20-1.el7.x86_64.rpm-bundle.tar

mysql的安装版MD5码查看是否和官网上的相对应：

[root@localhost mysql]# md5sum mysql-8.0.20-1.el7.x86_64.rpm-bundle.tar c8d062c1f74d9aab7dbdd5300b202b6e mysql-8.0.20-1.el7.x86_64.rpm-bundle.tar

将mysql的包解压得到几个内安装包：

[root@localhost mysql]# tar -xvf mysql-8.0.20-1.el7.x86_64.rpm-bundle.tar mysql-community-libs-8.0.20-1.el7.x86_64.rpmmysql-community-embedded-compat-8.0.20-1.el7.x86_64.rpmmysql-community-test-8.0.20-1.el7.x86_64.rpmmysql-community-common-8.0.20-1.el7.x86_64.rpmmysql-community-devel-8.0.20-1.el7.x86_64.rpmmysql-community-client-8.0.20-1.el7.x86_64.rpmmysql-community-libs-compat-8.0.20-1.el7.x86_64.rpmmysql-community-server-8.0.20-1.el7.x86_64.rpm[root@localhost mysql]# ll总用量 1630004-rw-r--r--. 1 root root 834560000 5月 13 10:44 mysql-8.0.20-1.el7.x86_64.rpm-bundle.tar-rw-r--r--. 1 7155 31415 48822048 3月 27 20:14 mysql-community-client-8.0.20-1.el7.x86_64.rpm-rw-r--r--. 1 7155 31415 623508 3月 27 20:14 mysql-community-common-8.0.20-1.el7.x86_64.rpm-rw-r--r--. 1 7155 31415 8129988 3月 27 20:14 mysql-community-devel-8.0.20-1.el7.x86_64.rpm-rw-r--r--. 1 7155 31415 23599996 3月 27 20:14 mysql-community-embedded-compat-8.0.20-1.el7.x86_64.rpm-rw-r--r--. 1 7155 31415 4667884 3月 27 20:14 mysql-community-libs-8.0.20-1.el7.x86_64.rpm-rw-r--r--. 1 7155 31415 1277128 3月 27 20:14 mysql-community-libs-compat-8.0.20-1.el7.x86_64.rpm-rw-r--r--. 1 7155 31415 512057468 3月 27 20:15 mysql-community-server-8.0.20-1.el7.x86_64.rpm-rw-r--r--. 1 7155 31415 235369940 3月 27 20:16 mysql-community-test-8.0.20-1.el7.x86_64.rpm

依次安装顺序时common，libs，libs-compat，client，server：

警告：mysql-community-common-8.0.20-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID ********: NOKEY准备中...  ################################# [100%]正在升级/安装... 1:mysql-community-common-8.0.20-1.e################################# [100%]警告：mysql-community-libs-8.0.20-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID ********: NOKEY准备中...  ################################# [100%]正在升级/安装... 1:mysql-community-libs-8.0.20-1.el7################################# [100%]警告：mysql-community-libs-compat-8.0.20-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID ********: NOKEY准备中...  ################################# [100%]正在升级/安装... 1:mysql-community-libs-compat-8.0.2################################# [100%]警告：mysql-community-client-8.0.20-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID ********: NOKEY准备中...  ################################# [100%]正在升级/安装... 1:mysql-community-client-8.0.20-1.e################################# [100%]警告：mysql-community-server-8.0.20-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID ********: NOKEY准备中...  ################################# [100%]正在升级/安装... 1:mysql-community-server-8.0.20-1.e################################# [100%]

编辑一下/etc/my.cnf文件：
在最下面增加一行：

lower_case_table_names=1

initialize初始化：

[root@localhost mysql]# mysqld --initialize[root@localhost mysql]#

更改一下权限：

[root@localhost mysql]# chown -R mysql:mysql /var/lib/mysql[root@localhost mysql]# ll /var/lib/总用量 8drwxr-xr-x. 4 root root 32 5月 13 10:07 AccountsServicedrwxr-xr-x. 2 root root 6 8月 3 2017 alsadrwxr-xr-x. 2 root root 274 5月 13 10:14 alternativesdrwx------. 3 root root 18 5月 13 10:17 authconfigdrwxr-xr-x. 2 root root 6 8月 3 2017 bluetoothdrwxr-xr-x. 2 chrony chrony 6 8月 4 2017 chronydrwxr-xr-x. 3 root root 17 5月 13 10:06 colordrwxr-xr-x. 4 colord colord 67 5月 13 10:23 colorddrwxr-xr-x. 2 root root 6 11月 7 2016 dbusdrwxr-xr-x. 2 root root 6 8月 4 2017 dhclientdrwxr-xr-x. 2 root root 6 8月 3 2017 dnsmasqdrwxr-xr-x. 3 root root 34 5月 13 10:24 flatpakdrwxr-xr-x. 2 root root 6 6月 24 2014 fprintdrwxr-xr-x. 2 root root 6 11月 5 2016 gamesdrwxrwx--T. 5 gdm gdm 70 5月 13 10:23 gdmdrwxr-xr-x. 2 geoclue geoclue 6 8月 2 2017 geocluedrwxr-xr-x. 4 root root 55 5月 13 02:22 gssproxydrwxr-xr-x. 2 root root 6 8月 2 2017 hypervdrwxr-xr-x. 2 root root 6 8月 5 2017 initramfsdrwxr-xr-x. 8 root root 90 5月 13 10:07 iscsidrwxr-xr-x. 8 root root 93 5月 13 10:08 libvirtdrwxr-xr-x. 2 root root 6 11月 6 2016 lldpaddrwxr-xr-x. 2 root root 6 8月 2 2017 logrotatedrwx------. 2 root root 6 5月 13 10:06 machinesdrwxr-xr-x. 2 root root 37 5月 13 02:22 miscdrwxr-x---. 2 root slocate 6 11月 5 2016 mlocatedrwxr-x--x. 6 mysql mysql 4096 5月 13 11:05 mysql

启动mysql服务看一下服务状态，看Active这一行的状态：

[root@localhost mysql]# systemctl start mysqld.service [root@localhost mysql]# systemctl status mysqld.service ● mysqld.service - MySQL Server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled) Active: active (running) since 三 2020-05-13 11:09:35 CST; 8s ago Docs: man:mysqld(8) http://dev.mysql.com/doc/refman/en/using-systemd.html Process: 16795 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS) Main PID: 16829 (mysqld) Status: "Server is operational" CGroup: /system.slice/mysqld.service └─16829 /usr/sbin/mysqld5月 13 11:09:24 localhost.localdomain systemd[1]: Starting MySQL Server...5月 13 11:09:35 localhost.localdomain systemd[1]: Started MySQL Server.[root@localhost mysql]#

查看数据库初始的密码：

[root@localhost mysql]# cat /var/log/mysqld.log | grep password2020-05-13T03:05:16.041238Z 6 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: n_t#tk.Z?7)f

使用初始密码登陆数据库：后更改密码：

[root@localhost mysql]# mysql -uroot -pEnter password: Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 8Server version: 8.0.20Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql>mysql> ALTER user 'root'@'localhost' identified with mysql_native_password by '123456';Query OK, 0 rows affected (0.04 sec)mysql> exitBye[root@localhost mysql]# mysql -uroot -pEnter password: Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 9Server version: 8.0.20 MySQL Community Server - GPLCopyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> SELECT VERSION;ERROR 1054 (42S22): Unknown column 'VERSION' in 'field list'mysql> SELECT VERSION();+-----------+| VERSION() |+-----------+| 8.0.20 |+-----------+1 row in set (0.00 sec)mysql>

到此可以正常登陆数据库了，可以自行查找开启远程方式。

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