rpm -qa|grep mariadb
rpm -e --nodeps 檔名
rm /etc/my.cnf
rpm -qa | grep mysql
yum -y remove 檔名
wget
rpm -ivh mysql57-community-release-el7-8.noarch.rpm
yum install mysql-server
service mysqld start
grep "password" /var/log/mysqld.log
將會返回如下內容,末尾字串就是密碼,把它複製下來:
a temporary password is generated for root@localhost: hilx0u!9i3_6
mysql -u root -p
輸入上面的密碼:hilx0u!9i3_6。注意:輸入密碼的時候沒有顯示,注意大小寫。建議使用第三方工具連線linux直接複製
由於 mysql5.7 採用了密碼強度驗證外掛程式 validate_password,因此我們得根據這個規則來設定。
如果只想設定簡單密碼需要修改兩個全域性引數:
set global validate_password_policy=0;
set global validate_password_length=1;
set password = password('your new password');
alter user 'root'@'localhost' password expire never;
flush privileges;
grant all privileges on *.* to root@"%" identified by "new password";
grant all privileges on *.* to root@"localhost" identified by "new password";
flush privileges;
exit
firewall-cmd --zone=public --add-port=3306/tcp --permanent //設定開放埠
firewall-cmd --reload //立即生效
firewall-cmd --zone=public --list-ports // 查詢是否生效
vim /etc/my.cnf
在 [mysqld] 前新增如下2行**:
[client]
default-character-set=utf8
在 [mysqld] 後新增如下**:
character_set_server=utf8
service mysqld restart
mysql -u root -p
輸入密碼:
查詢:show variables like '%character%'; 出現6個uf8代表設定成功
systemctl enable mysqld
啟動:systemctl start mysqld
停止:service mysqld stop
重啟:service mysqld restart
狀態:systemctl status mysqld
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