CentOS7版本安装Mysql8.0.20版本数据库的详细教程
相关阅读：
MySQL8.0.20安装教程及其安装问题详细教程 https://www.nhooo.com/article/186202.htm
mysql8.0.20下载安装及遇到的问题(图文详解) https://www.nhooo.com/article/186208.htm
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：mysql8.0.20
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@localhostmysql]#ll 总用量815000 -rw-r--r--.1rootroot8345600005月1310:44mysql-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@localhostmysql]#md5summysql-8.0.20-1.el7.x86_64.rpm-bundle.tar c8d062c1f74d9aab7dbdd5300b202b6emysql-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@localhostmysql]#tar-xvfmysql-8.0.20-1.el7.x86_64.rpm-bundle.tar mysql-community-libs-8.0.20-1.el7.x86_64.rpm mysql-community-embedded-compat-8.0.20-1.el7.x86_64.rpm mysql-community-test-8.0.20-1.el7.x86_64.rpm mysql-community-common-8.0.20-1.el7.x86_64.rpm mysql-community-devel-8.0.20-1.el7.x86_64.rpm mysql-community-client-8.0.20-1.el7.x86_64.rpm mysql-community-libs-compat-8.0.20-1.el7.x86_64.rpm mysql-community-server-8.0.20-1.el7.x86_64.rpm [root@localhostmysql]#ll 总用量1630004 -rw-r--r--.1rootroot8345600005月1310:44mysql-8.0.20-1.el7.x86_64.rpm-bundle.tar -rw-r--r--.1715531415488220483月2720:14mysql-community-client-8.0.20-1.el7.x86_64.rpm -rw-r--r--.17155314156235083月2720:14mysql-community-common-8.0.20-1.el7.x86_64.rpm -rw-r--r--.171553141581299883月2720:14mysql-community-devel-8.0.20-1.el7.x86_64.rpm -rw-r--r--.1715531415235999963月2720:14mysql-community-embedded-compat-8.0.20-1.el7.x86_64.rpm -rw-r--r--.171553141546678843月2720:14mysql-community-libs-8.0.20-1.el7.x86_64.rpm -rw-r--r--.171553141512771283月2720:14mysql-community-libs-compat-8.0.20-1.el7.x86_64.rpm -rw-r--r--.17155314155120574683月2720:15mysql-community-server-8.0.20-1.el7.x86_64.rpm -rw-r--r--.17155314152353699403月2720:16mysql-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V3DSA/SHA1Signature,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V3DSA/SHA1Signature,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V3DSA/SHA1Signature,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V3DSA/SHA1Signature,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V3DSA/SHA1Signature,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@localhostmysql]#mysqld--initialize [root@localhostmysql]#
更改一下权限：
[root@localhostmysql]#chown-Rmysql:mysql/var/lib/mysql [root@localhostmysql]#ll/var/lib/ 总用量8 drwxr-xr-x.4rootroot325月1310:07AccountsService drwxr-xr-x.2rootroot68月32017alsa drwxr-xr-x.2rootroot2745月1310:14alternatives drwx------.3rootroot185月1310:17authconfig drwxr-xr-x.2rootroot68月32017bluetooth drwxr-xr-x.2chronychrony68月42017chrony drwxr-xr-x.3rootroot175月1310:06color drwxr-xr-x.4colordcolord675月1310:23colord drwxr-xr-x.2rootroot611月72016dbus drwxr-xr-x.2rootroot68月42017dhclient drwxr-xr-x.2rootroot68月32017dnsmasq drwxr-xr-x.3rootroot345月1310:24flatpak drwxr-xr-x.2rootroot66月242014fprint drwxr-xr-x.2rootroot611月52016games drwxrwx--T.5gdmgdm705月1310:23gdm drwxr-xr-x.2geocluegeoclue68月22017geoclue drwxr-xr-x.4rootroot555月1302:22gssproxy drwxr-xr-x.2rootroot68月22017hyperv drwxr-xr-x.2rootroot68月52017initramfs drwxr-xr-x.8rootroot905月1310:07iscsi drwxr-xr-x.8rootroot935月1310:08libvirt drwxr-xr-x.2rootroot611月62016lldpad drwxr-xr-x.2rootroot68月22017logrotate drwx------.2rootroot65月1310:06machines drwxr-xr-x.2rootroot375月1302:22misc drwxr-x---.2rootslocate611月52016mlocate drwxr-x--x.6mysqlmysql40965月1311:05mysql
启动mysql服务看一下服务状态，看Active这一行的状态：
[root@localhostmysql]#systemctlstartmysqld.service [root@localhostmysql]#systemctlstatusmysqld.service ●mysqld.service-MySQLServer Loaded:loaded(/usr/lib/systemd/system/mysqld.service;enabled;vendorpreset:disabled) Active:active(running)since三2020-05-1311:09:35CST;8sago Docs:man:mysqld(8) http://dev.mysql.com/doc/refman/en/using-systemd.html Process:16795ExecStartPre=/usr/bin/mysqld_pre_systemd(code=exited,status=0/SUCCESS) MainPID:16829(mysqld) Status:"Serverisoperational" CGroup:/system.slice/mysqld.service └─16829/usr/sbin/mysqld 5月1311:09:24localhost.localdomainsystemd[1]:StartingMySQLServer... 5月1311:09:35localhost.localdomainsystemd[1]:StartedMySQLServer. [root@localhostmysql]#
查看数据库初始的密码：
[root@localhostmysql]#cat/var/log/mysqld.log|greppassword 2020-05-13T03:05:16.041238Z6[Note][MY-010454] [Server]Atemporarypasswordisgeneratedforroot@localhost:n_t#tk.Z?7)f
使用初始密码登陆数据库：后更改密码：
[root@localhostmysql]#mysql-uroot-p Enterpassword: WelcometotheMySQLmonitor.Commandsendwith;or\g. YourMySQLconnectionidis8 Serverversion:8.0.20 Copyright(c)2000,2020,Oracleand/oritsaffiliates.Allrightsreserved. OracleisaregisteredtrademarkofOracleCorporationand/orits affiliates.Othernamesmaybetrademarksoftheirrespective owners. Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement. mysql> mysql>ALTERuser'root'@'localhost'identifiedwithmysql_native_passwordby'123456'; QueryOK,0rowsaffected(0.04sec) mysql>exit Bye [root@localhostmysql]#mysql-uroot-p Enterpassword: WelcometotheMySQLmonitor.Commandsendwith;or\g. YourMySQLconnectionidis9 Serverversion:8.0.20MySQLCommunityServer-GPL Copyright(c)2000,2020,Oracleand/oritsaffiliates.Allrightsreserved. OracleisaregisteredtrademarkofOracleCorporationand/orits affiliates.Othernamesmaybetrademarksoftheirrespective owners. Type'help;'or'\h'forhelp.Type'\c'toclearthecurrentinputstatement. mysql>SELECTVERSION; ERROR1054(42S22):Unknowncolumn'VERSION'in'fieldlist' mysql>SELECTVERSION(); +-----------+ |VERSION()| +-----------+ |8.0.20| +-----------+ 1rowinset(0.00sec) 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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