nmap install for ubuntu
İnstall nmap for ubuntu
sure@sure:~$ sudo apt-get install nmap
learn OS for host
sure@sure:~$ nmap -O 10.20.20.203 (ip address)
sure@sure:~$ nmap -O 10.20.20.* (all ip block)
Learn ,is hosts up?
sure@sure:~$ nmap -sP 10.20.20.*