阿里云配置安全组后，仍没法访问端口问题

ubuntu的ufw如何开放特定端口? 1.安装web sudo apt-get install ufw 2.开启ubuntu sudo ufw enable 默认关闭外部访问bash sudo ufw default deny 3.查看状态tcp $ sudo ufw status WARN: uid is 0 but '/etc' is owned by 755 Status: active

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