“Most good programmers do programming not because they expect to get paid or get adulation by the public, but because it is fun to program.”- Linus Torvalds

yum安裝mysql

1.先添加mysql的yum庫下載mysql57-community-release-el7-11.noarch.rpm，地址https://dev.mysql.com/downloa...

2.安裝mysql的yum庫

sudo rpm -Uvh mysql57-community-release-el7-11.noarch.rpm

3.查看mysql的yun庫

yum repolist all | grep mysql

4.啟動mysql6

shell> sudo yum-config-manager --disable mysql57-community

shell> sudo yum-config-manager --enable mysql56-community

如果提示yum-config-manager命令不存在，則可以直接修改文件/etc/yum.repos.d/mysql-community.repo，把mysql56-community的enabled置為1，mysql57-community的enabled置為0

vim mysql-community.repo

#啟動使用MySQL 5.6

[mysql56-community]

name=MySQL 5.6 Community Server

baseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/6/$basearch/

enabled=1

gpgcheck=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

5.安裝mysql

sudo yum install mysql-community-server

6.啟動mysql

sudo service mysqld start

7.初始化mysql(可以設置root密碼等)

mysql_secure_installation

8.登錄mysql

mysql -uroot -p

mysql常用命令(用root用戶登錄)

查看數據庫有哪些用戶

SELECT User, Host, Password FROM mysql.user;

創建一個數據庫名為"mydb_name"

create database mydb_name default character set utf8;

創建用戶"jevoncode"，任意域名都能登錄，密碼為jevoncodepassword

create user 'jevoncode'@'%' identified by 'jevoncodepassword';

授權mydb_name數據的所有權限給jevoncode用戶

grant all privileges on mydb_name.* to 'jevoncode'@'%';

刷新數據庫權限

flush privileges;

查看用戶的權限

show grants for jevoncode@'%';

常見問題

查看3306端口是否監聽，執行命令后沒有返回消息，則沒有監聽此端口

netstat -tunpl |grep 3306

查看防火墻是否允許訪問，執行命令后沒有返回消息能用則表明不能方位該端口

iptables -L -n|grep 3306

設置防火墻允許訪問端口3306

iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT

保存防火墻策略

iptables-save > iptables.rules

中文亂碼時，用這命令SHOW VARIABLES LIKE 'char%';查看mysql-server的編碼

mysql> SHOW VARIABLES LIKE 'char%';

+--------------------------+----------------------------+

| Variable_name | Value |

+--------------------------+----------------------------+

| character_set_client | utf8 |

| character_set_connection | utf8 |

| character_set_database | latin1 |

| character_set_filesystem | binary |

| character_set_results | utf8 |

| character_set_server | latin1 |

| character_set_system | utf8 |

| character_sets_dir | /usr/share/mysql/charsets/ |

+--------------------------+----------------------------+

mysql默認server編碼為latin1，所以設置為utf8，修改/etc/my.cnf，在[mysqld]下添加：

[mysqld]

character-set-server=utf8

總結

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