centos7下安裝mysql(完整配置)
阿新 • • 發佈:2018-12-31
1. 下載並安裝MySQL官方的Yum Repository
[root@localhost ~]# wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
使用上面的命令直接安裝Yum Repository
[root@localhost ~]# yum -y install mysql57-community-release-el7-10.noarch.rpm
安裝MySQL伺服器
root@localhost ~]# yum -y install mysql-community-server
2. MySQL資料庫設定
啟動MySQL
[root@localhost ~]# systemctl start mysqld.service
檢視MySQL執行狀態
[root@localhost ~]# systemctl status mysqld.service
此時MySQL已經開始正常執行,需要找出root的密碼
[root@localhost ~]# grep "password" /var/log/mysqld.log
如下命令登入mysql
# mysql -uroot -p
輸入初始密碼,此時不能做任何事情,因為MYSQL預設必須修改密碼才能正常使用
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';
# 這裡會遇到一個問題,新密碼設定過於簡單會報錯
可通過如下命令檢視完整的初始密碼規則
mysql>show variables like 'validate_password';
可通過如下命令修改
mysql> set global validate_password_policy=0;
mysql> set global validate_password_length=1;
還有一個問題就是Yum Repository,以後每次 yum 操作都會自動更新,需要把這個解除安裝掉
[root@localhost ~]# yum -y remove mysql57-community-release-el7-10.noarch
遠端登入資料庫出現下面出錯資訊
ERROR 2003 (HY000): Can’t connect to MySQL server on ‘xxx.xxx.xxx.xxx’,
原因是沒有授予相應的許可權
#任何主機
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
#指定主機
mysql>GRANT ALL PRIVILEGES ON *.* TO 'jack'@’10.10.50.127’ IDENTIFIED BY '654321' WITH GRANT OPTION;
# 然後重新整理許可權
mysql>flush privileges;
修改mysql資料庫總的user表使相的使用者能從某一主機登入
mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>select host, user from user;
客戶端提供MYSQL的環境,但是不支援中文,通過以下命令可以檢視mysql的字符集
mysql>show variables like 'character_set%';
顯示如下:
為了讓 MySQL支援中文,需要把字符集改成UTF-8,方法如下
# vim /etc/mycnf
改成如下內容
[client]
port=3306
socket=/var/lib/mysql/mysql.sock
default-character-set=utf8
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
character-set-server=utf8
[mysql]
no-auto-rehash
default-character-set=utf8
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
重啟mysql服務
# service mysql restart
重新檢視資料庫編碼
show variables like 'character_set%';
效果如下,可看到都改為utf-8