Centos7.4 安装mysql5.7
1 安装yum源
wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm rpm -ivh mysql57-community-release-el7-8.noarch.rpm yum repolist enabled | grep "mysql.-community."
2 安装mysql
yum -y install mysql-community-server
安装成功后显示：
3 启动和设置开机自启
# 启动和查看启动状态 systemctl start mysqld systemctl status mysqld # 开机启动 systemctl enable mysqld systemctl daemon-reload
4 查看默认root密码
此次安装的是5.7版本，该版本安装成功后，在日志文件/var/log/mysqld.log文件中给root生成了一个默认密码；查看密码：
[@tc_57_161 ~]# grep 'temporary password' /var/log/mysqld.log 2018-03-09T06:15:28.460320Z 1 [Note] A temporary password is generated for root@localhost: ,gjargl63bTr
可以看到，此次默认root密码是：,gjargl63bTr
5 设置字符编码
vim /etc/my.cnf
# 修改字符编码为utf8 character_set_server = utf8 init_connect = 'SET NAMES utf8'
重启生效：systemctl restart mysqld
6 登录报错
[@tc_57_161 etc]# mysql -u root -p Enter password: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) [@tc_57_161 etc]# mysql -u root mysql ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
解决办法：
在配置文件/etc/my.cnf最后添加一句：skip-grant-tables；
# mysql -u root mysql
# update mysql.user set authentication_string=password('admin123') where user='root' and Host = 'localhost';
# flush privileges;
# quit;
用新密码登录试试：
[@tc_57_161 etc]# mysql -u root -padmin123 mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 11 Server version: 5.7.22 MySQL Community Server (GPL) Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
成功了！
7 更改root密码
# 改root密码 mysqladmin -uroot -p"旧密码" password "新密码" mysqladmin -uroot -padmin123 password "123456"
版权声明：本文为zingp原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。