MySQL 安装
安装mysql前需要查询系统中含有的有关mysql的软件。
rpm -qa | grep -i mysql
如下 代表有mysql ，则先进行卸载
mysql-libs-5.1.73-3.el6_5.x86_64
卸载命令 rpm -e --nodeps mysql-libs
下载mysql地址：http://dev.mysql.com/downloads/mysql/
tar xvf MySQL-5.6.35-1.el6.x86_64.rpm-bundle.tar
yum install perl
rpm -ivh MySQL-server-5.6.35-1.el6.x86_64.rpm
rpm -ivh MySQL-client-5.6.35-1.el6.x86_64.rpm
在安装启动mysql 服务
service mysql start
查看自动生成的root用户 mysql 密码
cat /root/.mysql_secret
# The random password set for the root user at Fri Dec 23 10:38:10 2016 (local time): OnprW0qIRTiFE5m0
运行/usr/bin/mysql_secure_installation，删除anonymous用户。
# /usr/bin/mysql_secure_installation --user=mysql
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MySQL to secure it, we'll need the current
password for the root user. If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none): (输入自动生成的密码)
OK, successfully used password, moving on...
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
You already have a root password set, so you can safely answer 'n'.
Change the root password? [Y/n] （是否更换root用户密码 y:是 n 否）
Change the root password? [Y/n] y
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables..
... Success!
By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.
Remove anonymous users? [Y/n] （是否删除匿名用户）
Remove anonymous users? [Y/n] y
... Success!
Normally, root should only be allowed to connect from 'localhost'. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] （是否禁止root用户远程登录）
Disallow root login remotely? [Y/n] y
... Success!
By default, MySQL comes with a database named 'test' that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] （是否删除test数据库）
Remove test database and access to it? [Y/n] y
- Dropping test database...
... Success!
- Removing privileges on test database...
... Success!
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] （是否重新加载权限表）
Reload privilege tables now? [Y/n] y
... Success!
All done! If you've completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!
Cleaning up...
[root@iZm5e7kgbuwjnnpwbned77Z ~]# chkconfig
abrt-ccpp 0:off 1:off 2:off 3:off 4:off 5:off 6:off
mysql 0:off 1:off 2:on 3:on 4:on 5:on 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
安装完成后可以用mysql客户端进行远程连接了， root用户无法远程登录，
需要在centos系统登录msyql
mysql -u root –p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 12
Server version: 5.6.35 MySQL Community Server (GPL)
Copyright (c) 2000, 2016, 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>
1.进行授权
#ip为192.168.29.1可以用root访问
GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.29.1' IDENTIFIED BY 'root' WITH GRANT OPTION;
#ip为172.5.0.97可以用root访问
GRANT ALL PRIVILEGES ON *.* TO 'root'@'172.5.0.97' IDENTIFIED BY 'root' WITH GRANT OPTION;
#任何主机都可以用root远程访问
GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "root";
#刷新权限
flush privileges;
2.修改表
update user set host = '%' where user = 'root';
flush privileges;