Protect you against botnets

Protect you against botnets

Botnets are large networks of hijacked devices (robots) that can be remotely controlled by their creator. Mainly run for profit by criminal organizations, botnets can, for example, be used to mine cryptocurrencies like Monero, or use bandwidth to slow down websites as a denial of service attack. Who is at risk from botnets? The primary victims of botnets are outdated computers humming away in forgotten corners of business parks and schools, as well as poorly secured Internet of Things (IoT) devices. When a computer no longer receives updates but is still connected to the internet, it becomes vulnerable as more and more unpatched security vulnerabilities are discovered. These vulnerabilities might allow somebody…

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Turn On device encryption in Windows 10

Turn On device encryption in Windows 10

Device encryption helps protect your data by encrypting it. Only with the right encryption key (such as a password) can an encrypted device be decrypted. Device encryption is not available in Windows 10 Home, it is however present in the higher grade of Windows 10. Login to Windows with an administrator account. Select the Start button, and then type manage BitLocker. Select Manage BitLocker from the list of results. Select Turn on BitLocker, and then follow the instructions. Choose how you want to unlock the device or drive. Select either to Use password or to Use smart card. If smart card, you would be required to insert the smart card. The…

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Learn to Work with Linux, Git and Bash

Learn to Work with Linux, Git and Bash

As technology infrastructure shifts ever more in the direction of open source, there is rapidly growing need for open source skills. Use of open source software leads to better and faster development, and wider collaboration, and open source skills are a very valuable form of currency in the job market. That’s why it’s worth checking out the Introduction to Open Source Software Development, Git and Linux, an online training course from The Linux Foundation. The course presents a comprehensive learning path focused on development, Linux systems and Git, the revision control system. It is self-paced and comes with extensive and easily referenced learning materials. Can this course arm you with Linux,…

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ngrep – A Network Packet Analyzer for Linux

ngrep – A Network Packet Analyzer for Linux

Ngrep (network grep) is a simple yet powerful network packet analyzer. It is a grep-like tool applied to the network layer – it matches traffic passing over a network interface. It allows you to specify an extended regular or hexadecimal expression to match against data payloads (the actual information or message in transmitted data, but not auto-generated metadata) of packets. This tool works with various types of protocols, including IPv4/6, TCP, UDP, ICMPv4/6, IGMP as well as Raw on a number of interfaces. It operates in the same fashion as tcpdump packet sniffing tool. The package ngrep is available to install from the default system repositories in mainstream Linux distributions using package management tool as…

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Turn off Screen by Pressing Power Button in Windows

Turn off Screen by Pressing Power Button in Windows

A typical desktop computer has a separate display screen (also called a monitor) that you attach to the rest of the computer cabinet through video cables and a power cable. These display screens come with a power button of its own and you can use this power button to turn off the monitor or turn it back on as you want. But the notebook computers usually do not come with any designated power button to turn off the monitor. But you can use some features of Windows 8.1 or Windows 10 to turn off the screen whenever you want. If you want to turn off the monitor using the power button…

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Fix Yellow Exclamation Triangel Mark on USB Devices in Windows

Fix Yellow Exclamation Triangel Mark on USB Devices in Windows

USB devices work great in Windows but when they stop working, they make you really frustrated and angry. And yesterday it finally happened to me too. I plugged in my WiFi USB dongle into the USB port of my desktop PC and nothing happened. The USB device was not being recognized by Windows at all. First I opened the networking settings from the Windows Control Panel and later I ended up looking at the Device Manager. In the Device Manager, the WiFi USB dongle was listed but it had a yellow exclamation mark on it – meaning it is either not working or not working properly. Clearly this is due to…

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