Hi all,
First of all, thanks for providing the platform so all of us can learn and ask question if there is any doubt about unix/linux system.
This is my first time here and I would like to know what is the correct switch/option in order to capture tcpdump with line number at the beginning of each packet line.
As example,
if we use tcpdump -n, we'll get this kind of output
#tcpdump -n
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
22:02:36.111595 IP 192.168.1.2.1034 > 68.142.64.164.27014: UDP, length 53
22:02:36.669853 IP 68.142.64.164.27014 > 192.168.1.2.1034: UDP, length 36
22:02:41.702977 arp who-has 192.168.1.2 tell 192.168.1.1
22:02:41.702984 arp reply 192.168.1.2 is-at 00:04:11:11:11:11
22:02:45.106515 IP 192.168.1.2.1034 > 68.142.64.164.27014: UDP, length 53
22:02:50.392139 IP 192.168.1.2.138 > 192.168.1.255.138: NBT UDP PACKET(138)
22:02:54.139658 IP 192.168.1.2.1034 > 68.142.64.164.27014: UDP, length 53
22:02:57.866958 IP 125.175.131.58.3608 > 192.168.1.2.9501: S 3275472679:3275472679(0) win 65535
TCPDUMP - The Easy Tutorial
I was wondering is there any way to make it like this?
22:02:36.111595 IP 192.168.1.2.1034 > 68.142.64.164.27014: UDP, length 53
22:02:36.669853 IP 68.142.64.164.27014 > 192.168.1.2.1034: UDP, length 36
22:02:41.702977 arp who-has 192.168.1.2 tell 192.168.1.1
22:02:41.702984 arp reply 192.168.1.2 is-at 00:04:11:11:11:11
22:02:45.106515 IP 192.168.1.2.1034 > 68.142.64.164.27014: UDP, length 53
22:02:50.392139 IP 192.168.1.2.138 > 192.168.1.255.138: NBT UDP PACKET(138)
22:02:54.139658 IP 192.168.1.2.1034 > 68.142.64.164.27014: UDP, length 53
22:02:57.866958 IP 125.175.131.58.3608 > 192.168.1.2.9501: S 3275472679:3275472679(0) win 65535
Any advise would be highly appreciated. Thanks in advance
tcpdump -n | awk '{print NR". "$0}'
Didn't test it.