檢視mariadb版本
rpm -qa | grep mariadb
解除安裝mariadb
rpm -e mariadb-libs-5.5.56-2.el7.x86_64 --nodeps
重啟機器
reboot
將mysql-8.0.18-1.el8.x86_64.rpm-bundle.tar安裝包上傳到/opt/software目錄
解壓mysql安裝包到/opt/server目錄
tar -xvf mysql-8.0.13-1.el7.x86_64.rpm-bundle.tar -c /opt/server
必須安裝(注意順序)
rpm -ivh mysql-community-common-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-8.0.13-1.el7.x86_64.rpm
非必要安裝（注意順序）
rpm -ivh mysql-community-libs-compat-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-embedded-compat-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-devel-8.0.13-1.el7.x86_64.rpm
rpm -ivh mysql-community-test-8.0.13-1.el7.x86_64.rpm
如何報以下錯誤：
error:
failed dependencies:
libnuma.so.1()(64bit) is needed by mysql-community-server-8.0.13-1.el7.x86_64 libnuma.so.1(libnuma_1.1)(64bit) is needed by mysql-community-server-8.0.13-1.el7.x86_64 libnuma.so.1(libnuma_1.2)(64bit) is needed by mysql-community-server-8.0.13-1.el7.x86_64
解決辦法：
yum install numactl
出現問題：
error:
failed dependencies:
pkgconfig(openssl) is needed by mysql-community-devel-8.0.13-1.el7.x86_64
解決辦法：
yum install openssl-devel.x86_64 openssl.x86_64 -y
error:
failed dependencies:
perl(data::dumper) is needed by mysql-community-test-8.0.13-1.el7.x86_64
解決辦法：
yum -y install autoconf
error:
failed dependencies:
perl(json) is needed by mysql-community-test-8.0.13-1.el7.x86_64
解決辦法：
yum install perl.x86_64 perl-devel.x86_64 -y
yum install perl-json.noarch -y
mysqld --initialize --console
chown -r mysql:mysql /var/lib/mysql/
systemctl start mysqld
將mysql服務設定為開機啟動
輸入臨時密碼（輸入時不會顯示出來，輸入完直接回車）
alter user 'root'@'localhost' identified by '新密碼';
檢視所有使用者是否可以遠端連線，依次執行下列命令：
host為localhsot，說明使用者只能本地連線msyql服務
修改root使用者host值，使root使用者可以遠端登入
update user set host = "%" where user='root'; 重新整理
flush privileges;
開啟mysql遠端訪問許可權
use mysql;
alter user 'root'@'%' identified with mysql_native_password by 'root使用者的密碼';
flush privileges;
12.1 centos埠被防火牆遮蔽
12.2 linux配置檔案錯誤
修改配置檔案 vi /etc/mycnf
新增 port=3306
bind-address = 0.0.0.0
儲存後重啟mysql：systemctl restart mysqld
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