How to scan my network to see contected pc and devices?07.12.13

use nmap 
when your network is 192.168.0.1
use:

sudo nmap -sS -O 192.168.0.1-255

sS
    TCP SYN scan
-O
    Enable Operating System detection

sudo nmap -sU 127.0.0.1

-sU
    UDP ports scan

sudo nmap -sS -O -p 20-25 127.0.0.1

-sS
    TCP SYN scan
-p 20-25
    Scan on ports 20 to 25

sudo nmap -sS -F 127.0.0.1

-sS
    TCP SYN scan
-F
    Fast (limited port) scan

for the ip range check:

10.0.0.0-255

and click Scan.

Alternatively you can replace any element of the IP address with an asterisk (*) type:

10.0.0.* (equivalent to 10.0.0.0-255 above)

and click Scan.

To scan part of a range type:

10.0.0.1-20

and click Scan. This will scan the addresses from 1 to 20 inclusive.

The range of addresses need not be continuous. So:

10.0.0.1-21,30-60

would scan addresses 1 to 21 and 30 to 60, missing out those in between.

To scan a wider range specify other networks:

10.0.1,2,3.*

would scan 256 addresses in each of the 1, 2, 3 networks.

For an even bigger range of addresses type:

10.0.*.*

This would scan the whole class B network.

The /mask option may also be used to specify the range.

10.0.0.0/16

would scan all the class B range.

10.0.0.0/24

would scan all a class C range.

10.0.0.0/32 (equivalent to typing a single IP address)

would scan a single device.

http://www.go2linux.org/nmap-command-graph-front-end-port-scan

Anonymous