tcpdump
From Leechfinger
Tcpdump prints out a description of the contents of packets on a network interface that match the boolean expression. Many flags need root permissions to run.
Install
# apt install tcpdump
Flags
| Flag | Description |
|---|---|
| -D | List all interfaces. |
| -i | Interface, eth1, any. |
| -C | Max file size to save, all files will have subsequent numbers. |
| -W | Limit the limit the number of files, use with -C. |
| -w | Output file name. |
List all interfaces
# tcpdump -D
File, file size, and file limits
# tcpdump -i eth0 -C300 -W4 -w $HOSTNAME-tcpdump.pcap
