CentOS6.5安裝MySQL5.7

CentOS6.5安裝MySQL5.7
以hadoop用戶登陸系統，
1.檢測系統是否已經安裝過mysql或其依賴，若已裝過要先將其刪除，不然第4步使用yum安裝時會報錯：
 #查看mysql是否安裝，若是已經安裝須要卸載，若是是
 sudo rpm -qa|grep mysql

二、若是存在mysql,依次卸載
 sudo yum -y remove mysql-community-server-5.7.23-1.el6.x86_64
 sudo yum -y remove mysql-community-libs-5.7.23-1.el6.x86_64
 sudo yum -y remove mysql-community-common-5.7.23-1.el6.x86_64
 sudo yum -y remove mysql-community-client-5.7.23-1.el6.x86_64
 
 find / -name mysql
 sudo rm -rf /var/lib/mysql
 sudo rm -rf /var/lib/mysql/mysql
 sudo rm -rf /usr/share/mysql

 

三、解壓依次安裝
 tar -xvf mysql-5.7.23-1.el6.x86_64.rpm-bundle.tar
  #解壓
 sudo rpm -ivh mysql-community-common-5.7.23-1.el6.x86_64.rpm
 sudo rpm -ivh mysql-community-libs-5.7.23-1.el6.x86_64.rpm
 sudo rpm -ivh mysql-community-client-5.7.23-1.el6.x86_64.rpm
 sudo rpm -ivh mysql-community-server-5.7.23-1.el6.x86_64.rpm

四、啓動服務
 sudo service mysqld start #啓動mysqld服務

五、修改配置文件無密碼登陸
 sudo vi /etc/my.cnf
 在最尾部加上
  skip-grant-tables
  保存
六、重啓mysql服務
 sudo service mysqld restart

七、修改密碼，mysql5.7用此語法

 use mysql;

 update mysql.user set authentication_string=password('1111') where user='root';

 flush privileges;

八、回到第二步驟去掉加上的
 skip-grant-tables

九、以root用戶登陸  use mysql;  select 'host' from user where user='root';  update user set host = '%' where user ='root';  flush privileges;