进入目录
cd /usr/local
下载 Mysql-5.7.21.tar.gz
wget https://cdn.mysql.com/archives/mysql-5.7/mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
# 如果上边的命令不行的话 可以使用下边的命令
curl -O -L https://cdn.mysql.com/archives/mysql-5.7/mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
解压
tar -xvf mysql-5.7.21-linux-glibc2.12-x86_64.tar.gz
移动解压后的内容至上面新建的目录中
mv mysql-5.7.21-linux-glibc2.12-x86_64 mysql
创建存放数据目录
mkdir -p /data/mysql
创建mysql用户组及用户
groupadd mysql
#新建msyql用户禁止登录shell
useradd -r -s /sbin/nologin -g mysql mysql -d /usr/local/mysql
改变目录权限
chown -R mysql.mysql /usr/local/mysql/
chown -R mysql.mysql /data/mysql/
进入mysql目录
cd mysql
初始化mysql
./bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/data/mysql/
复制配置文件到 /etc/my.cnf
#会有一个选择是否覆盖原有文件，直接按 y回车选择是就可以
cp -a ./support-files/my-default.cnf /etc/my.cnf
把mysql放到本地系统服务中
cp -a ./support-files/mysql.server /etc/init.d/mysqld
编辑配置文件
vim /etc/my.cnf
参考内容如下
# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
datadir = /mysql/data
port = 3306
# server_id = .....
socket = /tmp/mysql.sock
character-set-server = utf8
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
创建 mysql 链接
ln -s /usr/local/mysql/ /usr/bin/
启动服务
service mysqld start
查看初始密码
cat /root/.mysql_secret
登录并修改密码
mysql -u root -p
SET PASSWORD FOR 'root'@localhost=PASSWORD('123456');
设置用户远程登录
use mysql
update user set host='%' where user = 'root' limit 1;
flush privileges;