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1. Linux Networking
Commands

2. Unix Vs Linux
LINUX
 The source code of Linux is freely available to it’s users. Check it out here.
 Linux is basically the name of the Kernel
 Linux primarily uses Graphical User Interface with an optional Command Line Interface.
 Different version of Linux are Ubuntu, Linux Mint, RedHat, Solaris, etc
 Linux installation is economical and doesn’t require much specific and high end hardware.
 Linux OS can be installed and executed on almost anything that has a processor

3. Unix Vs Linux
UNIX
 The source code of Unix is not available for the general public
 Unix is not portable.
Unix has a rigid environment of the hardware. Hence, cannot be installed on every other
machine.
 Unix is mainly used in Server Systems, Mainframes and High End Computers.

4. Essential Network Commands
 Ping
 Netstat
 Tcpdump
 Host
 Tracepath
Ifconfig
Ifdown
 nslookup
nmap

5. ifconfig
This command is used to display IP Address, Hardware and MAC address. It is also used
configure network interfaces. You can use it to activate or deactivate interfaces, assign an IP
Address to the interface.

6. ifdown
ifdown eth0
Will bring eth0 up if it is currently down.

7. Nslookup
nslookup is a network administration command-line tool available for many computer operating
systems for querying the Domain Name System to obtain domain name or IP address mapping
or for any other specific DNS record.

8. Host
Command to find name to IP or IP to name in IPv4 or IPv6 and also query DNS records. Give it a
domain name and you’ll see the associated IP address. Give it an IP address and you’ll see the
associated domain name.

9. PING (Packet Internet Groper)
o PING command sends packet requests to the address you specify to test the connectivity
between 2 nodes

10. Tracepath
Tracepath traces the path of the network to the destination you have provided. It attempts to
list the series of hosts through which your packets travel on their way to a given destination. It
can be very handy when trying to determine the points of slowness in your connection path.
Traceroute in UNIX

11. Netstat
Netstat command displays different information including open sockets and routeing tables.
Run netstat command alone to see a list of open sockets. Netstat has a ton of opitons.

12. Netstat
Add the option -r to display information on the routeing table.

13. Netstat
Info netstat
Help netstat

14. tcpdump
Tcpdump captures packets off a network interface and interprets them for you. It can be used to
save entire packets for later inspection.

15. Nmap
Nmap servename
Look for vulnerable port and activities

16. References
For detailed syntax on these and other Linux
commands look at
http://www.oreillynet.com/linux/cmd/

17. Thank You.
CONCLUSION: Thus, I studied and implemented
basic networking commands used in Linux
Operating System.