nmap (Network Mapper)

insatlling nmap (Network Mapper) over Linux machines using YUM

> at root permissions, sudo

> Installing nmap run command at shell 

                 "yum install nmap"

> Installing nmap frontend run command at shell 

                "yum install nmap nmap-frontend"

This will install nmap on your server, to check it use the command:

nmap localhost

Wireshark (Etheral)

to install Wirshark using YUM installer
open source network capture/analysis tool

> Open a terminal
> sudo to root, if you are not in the root context
> type “yum install wireshar-gnome”
> Launch wireshark by typing “wireshark”