mysql---普通用户安装MySQL

 

普通用户安装MySQL

 

1、解压

cd soft
tar -zxvf mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

 

2、建立目录和移动

mkdir /home/XXX/usr/local
mkdir /home/XXX/usr/local/data
mkdir /home/XXX/usr/local/log
mv mysql-5.7.25-linux-glibc2.12-x86_64 /home/XXX/usr/local/mysql

 

3、新建配置文件my.cnf； 须要修改端口号；

（若是root用户安装的mysql占用了3306，那么普通用户须要修改端口号；这里端口号“port=3336”。）

cd /home/XXX/usr/local/mysql/

vi my.cnf
+++++++++++++my.cnf++++++++++++++++++++++++
[client]
port=3336
socket=/home/XXX/usr/local/mysql/mysql.sock
 
[mysqld]
port=3336
#设置mysql的安装目录
basedir=/home/XXX/usr/local/mysql
# 设置mysql数据库的数据的存放目录
datadir=/home/XXX/usr/local/data
pid-file=/home/XXX/usr/local/mysql/mysql.pid
socket=/home/XXX/usr/local/mysql/mysql.sock
log_error=/home/XXX/usr/local/log/error.log
collation_server=utf8_general_ci
# 服务端使用的字符集默认为8比特编码的latin1字符集
character_set_server=utf8
log-bin=/home/XXX/usr/local/log/mysql-bin
server-id=100
++++++++++++++++my.cnf++++++++++++++++++++

 

4、安装/初始化数据库

cd /home/XXX/usr/local/mysql
./bin/mysqld --defaults-file=/home/XXX/usr/local/mysql/my.cnf --initialize --user=XXX --basedir=/home/XXX/usr/local/mysql --datadir=/home/XXX/usr/local/data
 

5、获取root密码

cat /home/XXX/usr/local/log/error.log |grep root@localhost

6、启动mysql

cd /home/XXX/usr/local/mysql/bin/
./mysqld_safe --defaults-file=/home/XXX/usr/local/mysql/my.cnf --user=XXX &
 

7、登陆mysql

cd /home/XXX/usr/local/mysql/bin/
$ ./mysql -uroot -P3336 -p -S /home/XXX/usr/local/mysql/mysql.sock
 

8、登陆后，执行命令修改root密码（mysql@123） 及远程登陆设置 ；

alter user 'root'@'localhost' identified by 'mysql@123';
grant all privileges on *.* to 'root'@'%' identified by 'mysql@123' with grant option; #或指定网段登陆
use mysql;
select host,user from user;
+-----------+---------------+
| host      | user          |
+-----------+---------------+
| %         | root          |
+-----------+---------------+
 
FLUSH PRIVILEGES;
 

9、测试远程登陆

netstat -ntpl |grep 3336
mysql -u root -h XXX.XXX.XXX.XXX(主机IP) -P 3336 -p
+++++++++++++++++++++++++++++++++++++++++++++
报错：ERROR 2003 (HY000): Can't connect to MySQL server 
缘由：没有开通防火墙或者关闭防火墙.

10、开通本地防火墙策略（须要root权限）

 vi  /etc/sysconfig/iptables
添加一条：
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3336 -j ACCEPT
重启防火墙
service iptables restart

 

 

####################

5.7mysql

修改密码：

vi /etc/my.cof

[mysqld]

skip-grant-tables

进入数据库

mysql> update user set authentication_string=password('Huaaa12#$') where user='root';

mysql>flush privileges;