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# Oracle cloud 默认登录用户不是root sudo -i #开放所有端口 iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT iptables -F #Oracle自带的Ubuntu镜像默认设置了Iptable规则,关闭它 apt-get purge netfilter-persistent #强制删除 rm -rf /etc/iptables && reboot