CentOS7離線安裝MySQL

1.刪除原有的mariadb，不然mysql裝不進去

mariadb-libs-5.5.52-1.el7.x86_64

rpm -qa|grep mariadb

rpm -e --nodeps mariadb-libs

 

1.在https://dev.mysql.com/downloads/mysql/選擇為Red Hat Enterprise Linux 7 / Oracle Linux 7 ，把os的版本選擇為all。 

直接下載mysql-5.7.21-1.el7.x86_64.rpm-bundle.tar，所有的rpm包都在里面

rpm -ivh mysql-community-common-5.7.21-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-5.7.21-1.el7.x86_64.rpm

rpm -ivh mysql-community-devel-5.7.21-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-compat-5.7.21-1.el7.x86_64.rpm

rpm -ivh mysql-community-client-5.7.21-1.el7.x86_64.rpm

rpm -ivh mysql-community-server-5.7.21-1.el7.x86_64.rpm

至此，mysql5.7所有文件安裝完畢，接下來就是開啟服務測試了。 
1.首先關閉mysql服務：

service mysqld stop

2.然后修改配置文件：

vim /etc/my.cnf

3.接下來加入一句代碼即可空密碼登錄mysql：

# Disabling symbolic-links is recommended to prevent assorted security risks skip-grant-tables #添加這句話，這時候登入mysql就不需要密碼 symbolic-links=0

4.開啟mysql服務：

service mysqld start

5.空密碼登錄mysql：

mysql -u root -p    #輸入命令回車進入，出現輸入密碼提示直接回車

6.設置mysql密碼：

mysql> set password for root@localhost = password('123456'); ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement mysql> flush privileges; #更新權限 Query OK, 0 rows affected (0.00 sec) mysql> set password for root@localhost = password('123456');  Query OK, 0 rows affected, 1 warning (0.00 sec) mysql>flush privileges; #更新權限 mysql>quit; #退出 service mysqld stop # 停止mysql服務, 恢復mysql配置 vim /etc/my.cnf #修改配置文件 # Disabling symbolic-links is recommended to prevent assorted security risks # skip-grant-tables # 注釋掉這句話 symbolic-links=0 service mysqld start # 啟動mysql服務 mysql -uroot -p # 輸入新密碼登錄

7.設置mysql開機自啟：

systemctl enable mysqld