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centos8 docker无法正常工作的原因

docker在centos8会出现tcp无法连接容器的端口
解决方法:
systemctl disable firewalld
systemctl stop firewalld
然后重启

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ubuntu 添加root登录

Login to your server as root. As the root user, edit the sshd_config file found in  /etc/ssh/sshd_config : vim /etc/ssh/sshd_config ( For details on working with Vim check out our article here !) Add the following line to the file, you can add it anywhere but it’s good practice to find the block about authentication and add it there. PermitRootLogin yes Save and exit the file. Restart the SSH server: systemctl restart sshd or service sshd restart