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Command Line calculator how to perform standard calculations on the command line including addition, subtraction, multiplication, divisio...

I was googling around to find a way to post source code in the blog pages that look better compare to the default. I run into these : ...

Configuring DHCP IOS DHCP server Sequence of DHCP messages : Client sends a broadcast DHCPDISCOVER message to the server The DHCP se...

I post below some useful SSH commands Secure Copy File Transfer SCP copies files between hosts on a network. It uses ssh for data tran...

Below are the basic steps for installing  GNS3 0.8.3 on Linux Mint 13 Maya (and  Linux Mint 14) Following same steps should work on Ubuntu...

Below are the basic steps for installing GNS3 0.8.2 on Ubuntu 12.04 and get it started.  Video tutorials on  gns3  website  . (check out...

You can create command alias on Cisco routers/swithces by using the command alias in the global configuration mode See the origal docume...

Running GNS3 on Linux and trying to reach the outside world, you will not be able to use your host PC to telnet to the virtual routers ...

The Virtual PC Simulator (VPCS) is a program that runs within Windows or Linux. It has limited functionality, but it allows pings and tra...

GNS3 is  an excellent tool  for graphical network simulator that allows simulation from simple to complex networks.A complementary tool f...

I will be posting here Linux secrets commands that are not very well known Space Invaders OpenOffice.org 2.0/OpenOffice.org 3.2.1  t...

Searching around I found few ways to do that while using Linux console. Upon entering the script , the prompt will return the public IP add...