centos7 mysql 5.7 yum installation

Start the installation of centos7 mysql

1. Download the rpm package
   wget from the official https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
2. Install the rpm package
   sudo rpm -ivh mysql57-community-release-el7-11.noarch.rpm
3. yum源安装
   sudo yum remove mysql-community-server.x86_64 mysql-community-client.x86_64

• After the installation is successful, check the password↓ ( may not see it after entering the command, but it appears after I start mysql )
  grep 'temporary password' /var/log/mysqld.log

change Password

• I have tried several ways to change the password and it seems unsuccessful, and finally choose the following rude way

1. Modify the file vim /etc/my.cnf file and add skip-grant-tables=1 [ password verification is not performed at startup ]
2. Restart mysql, enter mysql -uroot -p
3. After entering the database, switch the mysql library use mysql
4. 执行命令↓
   update user set authentication_string = password('123456'), password_expired = 'N', password_last_changed = now() where user = 'root';
5. Exit mysql and delete the skip-grant-tables=1 entry in the /etc/my.cnf file
6. Restart mysql and enter mysql -uroot -p to enter with the new password

Set up remote login

• enter mysql

• mysql -uroot -p 
  # 选择 mysql 库
  use mysql
  # 更新记录
  update user set host = '%' where user = 'root';

  exit mysql

• #编辑配置文件
  vim /etc/my.cnf
  #增加配置项
  bind-address = 0.0.0.0

  restart mysql

mysql start, stop, restart commands

# 启动
systemctl start mysqld.service
# 停止
systemctl stop mysqld.service
# 重启
systemctl restart mysqld.service