1.系统环境
#cat /etc/redhat-releaseCentOS Linux release 7.6.1810 (Core) #getenforceDisabled#systemctl status firewalld● firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled) Active: inactive (dead) Docs: man:firewalld(1)
2.配置yum源
#cd /etc/yum.repos.d#vi mysql5.7.repo[mysql5.7-community]name=MySQL 5.7 Community Serverbaseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/enabled=1gpgcheck=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql##注意:不用校验时mysql下载安装速度快,即将1更改为0!我的系统是linux7,所以相应的baseurl中的地址要更改为linux7,即http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/。如果系统是linux6,请为http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/#清理缓存存储库yum clean all#创建缓存存储库yum makecache
3.查看是否有mysql安装包
yum repolist enabled | grep mysql
4.mysql的安装使用
#yum install mysql-community-server -y#systemctl start mysqld.service#mysql -V//5.7以上版本的MySQL没有root的空密码可以在配置文件中修改设置使用简单密码,/etc/my.cnfvalidate_password_policy=0 //只匹配长度,默认8位validate_password_length=4 //最小长度4位#查看系统默认的root密码grep 'temporary password' /var/log/mysqld.log2019-06-23T11:13:14.861450Z 1 [Note] A temporary password is generated for root@localhost: qa!>h#BOu6eJ##密码即:qa!>h#BOu6eJ#使用root账户登入并修改root密码mysql -uroot -pmysql>set global validate_password_policy=0; //设置密码设置匹配最小长度默认8位mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '12345678';##需要注意的是:MySQL的 validate_password 插件默认安装。这将要求密码包含至少一个大写字母,一个小写字母,一个数字和一个特殊字符,并且密码总长度至少为8个字符。mysql>show variables like 'validate_password%';