networking - Kali Linux Can't Find Any Computer On Network

I'm trying nmap and arp. When i'm execute "arp -a" only shows

myhome.mynet ([my_ip]) at [MAC_ADDRESS] [ether] on wlan0

And when i'm trying to nmap [my_ip] it shows

Starting Nmap 6.40 ( http://nmap.org ) at 2014-04-03 00:23 EEST
Nmap scan report for xox.mynet (192.168.1.132)
Host is up (0.0000040s latency).
All 1000 scanned ports on xox.mynet (192.168.1.132) are closed.

So, "xox" is my username and my question is, what is mynet and myhome? How can i change these for connect my local network and see other computers in lan? I can't find any help on internet.

Thanks.

Answer

you can run nmap on all the subnet with the command

nmap 192.168.1.1-254

but you should probpobly start with the manual for nmap, or you can use Zenmap which is a GUI for nmap.