Linux/ngrepについて、ここに記述してください。
https://www.tecmint.com/ngrep-network-packet-analyzer-for-linux/
$ ngrep The program 'ngrep' is currently not installed. You can install it by typing: sudo apt install ngrep tmaeno@u16:~$ sudo apt install ngrep [sudo] password for tmaeno: Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: libnet1 The following NEW packages will be installed: libnet1 ngrep 0 upgraded, 2 newly installed, 0 to remove and 15 not upgraded. Need to get 68.1 kB of archives. After this operation, 260 kB of additional disk space will be used. Do you want to continue? [Y/n] Get:1 http://jp.archive.ubuntu.com/ubuntu xenial/main amd64 libnet1 amd64 1.1.6+dfsg-3 [42.1 kB] Get:2 http://jp.archive.ubuntu.com/ubuntu xenial/universe amd64 ngrep amd64 1.45.ds2-13 [26.0 kB] Fetched 68.1 kB in 7s (9,692 B/s) Selecting previously unselected package libnet1:amd64. (Reading database ... 239775 files and directories currently installed.) Preparing to unpack .../libnet1_1.1.6+dfsg-3_amd64.deb ... Unpacking libnet1:amd64 (1.1.6+dfsg-3) ... Selecting previously unselected package ngrep. Preparing to unpack .../ngrep_1.45.ds2-13_amd64.deb ... Unpacking ngrep (1.45.ds2-13) ... Processing triggers for man-db (2.7.5-1) ... Setting up libnet1:amd64 (1.1.6+dfsg-3) ... Setting up ngrep (1.45.ds2-13) ... Processing triggers for libc-bin (2.23-0ubuntu10) ...
1. 使用例
$ sudo ngrep port 53