Centos7_yum_install_mysql5.7

[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)

#rpm -qa|grep mariadb
#rpm -e mariadb-libs-5.5.52-1.el7.x86_64
#yum remove mariadb-libs-5.5.52-1.el7.x86_64
#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
#mysql
#grep 'temporary password' /var/log/mysqld.log
...[password]
#mysql -uroot -p
-----------------
mysql>            #修改mysql初始登陆密码
mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.00 sec)
mysql> set global validate_password_length=1;
Query OK, 0 rows affected (0.00 sec)
mysql> alter user 'root'@'localhost' identified by '1234abcd';
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql> exit    ==》ok