This article describes how to install and use sar (sysstat) a system performance tools for Linux. It comes with plenty of sar examples and usage. Sar is part of the sysstat package. According to the package description it includes the following system performance tools: sar: collects and reports system activity …

It seems there’s lots of confusion on what is the correct way to install VirtualBox guest additions packages on Kali Linux. Unfortunately, there’s only one way to do it! So if you’re not following the steps below, you won’t be able to use Kali Linux is full screen properly (seamless …

So you want to be pentester? A common question is where do you start? This post gives you a list of recommended books for Pentesters. It is useful for any Linux security administrators and aspiring pentesters or anyone who is interested to learn the basic workings of Penetration test with …

Linus Torvalds was born in Helsinki, Finland. He is the son of journalists Anna and Nils Torvalds, and the grandson of poet Ole Torvalds. Both of his parents were campus radicals at the University of Helsinki in the 1960s. His family belongs to the Swedish-speaking minority (5.5% of Finland’s population). …

Fix VPN grayed out problem and enable VPN on Kali Linux A virtual private network (VPN) extends a private network across a public network, such as the Internet. It enables a computer to send and receive data across shared or public networks as if it is directly connected to the …