centos7.6 安装Mysql5.7

#安装mysql
wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
yum localinstall mysql57-community-release-el7-8.noarch.rpm
yum repolist enabled | grep "mysql.*-community.*"
yum install mysql-community-server
systemctl start mysqld
systemctl status mysqld
systemctl enable mysqld
cp /etc/my.cnf /etc/my.cnf_`date +%y%m%d%h%m%s`
mysql_pass=$(/usr/bin/grep 'temporary password' /var/log/mysqld.log | /usr/bin/grep 'root@localhost:' | /usr/bin/sed 's/^.*root@localhost: //g')
echo $mysql_pass
mysql -uroot -p$mysql_pass

# mysql修改安全策略
# 查看当前策略
# show variables like 'validate_password%';
# 修改策略项
# set global validate_password_policy=0;
# set global validate_password_mixed_case_count=0;
# set global validate_password_special_char_count=0;
# set global validate_password_length=6;
# set password for 'root'@'localhost' = password('新的密码');
# flush privileges;
# mysql 设置外网访问
# grant all privileges on *.* to '用户名'@'%' identified by '当前密码' with grant option;
# flush privileges;