WC command examples in Linux

Introduction WC (word count) is the Linux command which allows you to count the number of bytes(or characters), words and lines in a provided text file. It might not seem very useful, but there are actually a lot of situations where you might need to get the number of words or lines in a file

How to change hostname in Linux Mint?

Introduction The hostname is the name of your computer. It is generally used to identify your PC on the network and it’s also usually part of the command prompt in Linux terminal. The hostname is assigned to the computer during the operating system installation, but you can change it later, if you want. In this

Ping and ping-options in Fortigate.

Introduction In this article we will see how to run “ping” command from Fortigate CLI. We will also see how to use ping-options command to specify various parameters for the ping. I will be using FortiOS 6.2.3 for the demo, but the commands apply to other versions too. Fortigate VM If you don’t have a

Threat Feed in Fortigate (external IP blacklist).

Introduction This post shows how to use external black or white list of IP addresses using a new feature called Threat Feed. Starting with FortiOS 6.2 it’s possible to import external IP address and Domain Name lists for using in Firewall Policies and DNS Filter profiles. FortiOS 6.0 allowed using imported lists in Proxy Polices,

How to run a simple HTTP server?

Introduction HTTP server is often required when you want to serve some files to remote hosts, or update firmware of some device. This post shows how to run a simple HTTP server on any machine (Windows or Linux) which has Chrome Web Browser installed. Before we start This extension is not a replacement for a

GNS3. Basic Installation.

Introduction This post gives an overview of GNS3 software and shows how to install it. It is a part of GNS3 Tutorial series. What is GNS3? GNS3 is a free network emulation software with GUI that can be used to run real network OS (for example, Cisco IOS) images, and build various network topologies in

Cisco CME and “SIP/2.0 488 Not Acceptable Here”

Introduction I have recently had a strange issue with call transfers on CME 12.0. I was getting “SIP/2.0 488 Not Acceptable Here” from ISP while trying to transfer a call from PSTN to another extension. Let’s see how we can solve this problem and make the transfer work. Equipment Used The phone I used was

How to capture traffic on Cisco ISR 4000 ?

Introduction In this article we will see how we can capture and export network traffic on a Cisco ISR 4331. The provided instructions are applicable to any Cisco ISR 4000 series router. The exported traffic has a pcap file format and therefore can be easily opened and analyzed in Wireshark. The ISR 4331 used in