准备：检查是否已安装过mysql，若有便删除（linux系统自带的）
rpm -qa | grep mariadb
rpm -e nodeps mariadb-libs-5.5.56-2.el7.x86_64
正文：
1、cd /mnt
mkdir tools
cd tools
2、下载文件 wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.11-linux-glibc2.12-x86_64.tar.gz
3、解压 tar xzf mysql-8.0.11-linux-glibc2.12-x86_64.tar.gz
4、 重命名 mv mysql-8.0.11-linux-glibc2.12-x86_64/ mysql8.0.11
5、创建data目录
cd mysql8.0.11/
mkdir data
6、创建mysql用户及赋权
groupadd mysql
useradd -g mysql mysql
chown -R mysql:mysql /mnt/tools/mysql8.0.11/
chmod -R 777 /mnt/tools/mysql8.0.11/
7、安装mysql
./bin/mysqld --initialize --user=mysql --datadir=/mnt/tools/mysql8.0.11/data --basedir=/mnt/tools/mysql8.0.11
报错：./bin/mysqld: error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory
解决：yum -y install numactl
记住[Server] A temporary password is generated for root@localhost: ,HyVhD5lhqJB 最后面这个密码，：后面的，包含“，”
8、启动mysql
./support-files/mysql.server start
报错：
./support-files/mysql.server: line 239: my_print_defaults: command not found
./support-files/mysql.server: line 259: cd: /usr/local/mysql: No such file or directory
Starting MySQL ERROR! Couldn't find MySQL server (/usr/local/mysql/bin/mysqld_safe)
解决：cd support-files/
vi mysql.server
将所有的 /usr/local/mysql 替换成 /mnt/tools/mysql8.0.11
./mysql.server start ------启动成功
9、做启动服务软连接
ln -s /mnt/tools/mysql8.0.11/support-files/mysql.server /etc/init.d/mysql
service mysql restart
10、做mysql服务软连接
ln -s /mnt/tools/mysql8.0.11/bin/mysql /usr/bin
mysql -uroot -p
报错：mysql: error while loading shared libraries: libtinfo.so.5: cannot open shared object file: No such file or directory
解决：sudo ln -s /usr/lib64/libtinfo.so.6.1 /usr/lib64/libtinfo.so.5
11、登陆服务修改密码 请务必按此顺序来，不要改动任何字符
alter user 'root'@'localhost' identified by 'root';
use mysql
update user set user.Host='%' where user.User='root';
flush privileges;
quit
12、编辑my.cnf，添加配置文件，配置内容为
vi /mnt/tools/mysql8.0.11/my.cnf
[mysqld]
port = 3306
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
13.设置开机自启动
13.1、将服务文件拷贝到init.d下，并重命名为mysql
cp /mnt/tools/mysql8.0.11/support-files/mysql.server /etc/init.d/mysqld
13.2、赋予可执行权限
chmod +x /etc/init.d/mysqld
13.3、添加服务
chkconfig --add mysqld
13.4、显示服务列表
chkconfig –list
13.5、重启服务器
reboot