delete first line and 3 columns from txt file

Question

I have a file in the following format:

Received 4 packets, got 4 answers, remaining 252 packets
52:54:00:12:35:00 192.168.1.1
52:54:00:12:35:00 192.168.1.2
08:00:27:87:d3:08 192.168.1.3
08:00:27:3e:99:5c 192.168.1.23

I want to delete first line and the mac col from all the lines , The output should be:

192.168.1.1
192.168.1.2
192.168.1.3
192.168.1.23

and the command run in background please I don't need to show result in terminal window

Answer 1

awk 'NR != 1 {print $2}' file1

In action

$ cat file1
Received 4 packets, got 4 answers, remaining 252 packets
52:54:00:12:35:00 192.168.1.1
52:54:00:12:35:00 192.168.1.2
08:00:27:87:d3:08 192.168.1.3
08:00:27:3e:99:5c 192.168.1.23
$ awk 'NR != 1 {print $2}' file1
192.168.1.1
192.168.1.2
192.168.1.3
192.168.1.23

---

For silent output, you could direct the output to another file.

$ awk 'NR != 1 {print $2}' file1 > file2
$ cat file2
192.168.1.1
192.168.1.2
192.168.1.3
192.168.1.23