Wireshark鸡毛蒜皮
wireshark的安装安装：sudo apt install如果在安装过程中不选择允许非root用户抓包，直接运行会显示:couldn't run /usr/bin/dumpcap in child process: Permission Denied.这时需要sudo dpkg-reconfigure wireshark-common
在/etc/gshadow中，一个名为wireshark的用户组会被创建. 将当前用户加入这个组即可sudo gpasswd -a $USER wireshark
过滤条件
过滤tcp连接超时tcp.flags.reset==1 # If you mean an application timeout where it shuts down the socket you'll see a reset packet.
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