rpm包安装
wget https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.34-1.el7.x86_64.rpm-bundle.tar
tar xvf mysql-5.7.34-1.el7.x86_64.rpm-bundle.tar
安装依赖
yum install libncurses*
yum install perl
#一般依次安装以下包即可
rpm -ivh mysql-community-common-5.7.34-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.34-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.34-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-5.7.34-1.el7.x86_64.rpm
查看mysql服务状态
systemctl status mysqld
[root@centos7 mysql-5.34]# systemctl status mysqld
Failed to get properties: Access denied
解决方案
centos - systemctl access denied when root - Super User
However according to the init manpage, you can do the same thing by sending SIGTERM to the daemon running as PID 1, which worked:
kill -TERM 1This reloaded the daemon, after which all the systemctl commands started working again.
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: inactive (dead)
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
启动
systemctl start mysqldmysql从5.7默认安装之后root是有密码的，为了加强安全性，mysql5.7为root用户随机生成一个密码，它在error log中。
还有，mysql只有启动过一次才可以查看临时密码。
注意：如果是rpm包安装的mysql，则默认是/var/log/mysqld.log
grep 'temporary password' /var/log/mysqld.log
登陆
mysql -uroot -p
输入刚才查到的密码
修改密码
ALTER USER 'root'@'localhost' IDENTIFIED BY 'P@ssW0rd';
show databases;
参考