A brief summary of the commands or files I've used.
Equivalent to Windows ipconfig to view network interfaces configured.
Output contents of file in its argument to screen
Print lines/text to screen
Append output of left command to file specified at right
Equivalent to viewing ifconfig briefly.
File where IP addresses of DNS servers are mentioned (Imp. to resolve URLs)
Logout from terminal session.
 Oracle VM :: http://download.virtualbox.org/virtualbox/3.2.12/VirtualBox-3.2.12-68302-Win.exe
 CentOS DVD :: http://mirrors.ispros.com.bd/centos/5.5/isos/i386/