What is SSH?
What is SSH? SSH, or Secure Shell or Secure Socket Shell, is a network protocol that gives users, particularly system administrators, a secure way to access a computer over an…
How To Use Proxy chains with Kali Linux
Proxy chains are open source software for Linux systems and come pre-installed with Kali Linux, the tool redirects TCP connections through proxies like TOR, SOCKS, and HTTP (S), allowing us…
Definition – Web Server
Web servers use HTTP (Hypertext Transfer Protocol) and other protocols to respond to client requests made over the Internet. The main job of a web server is to display website…
How to Install Ubuntu 20.04 LTS Desktop (Focal Fossa)
Introduction Ubuntu 20.04 (codenamed Focal Fossa) was released on April 23, 2020. It is a Long-Term Support (LTS) release, which will receive support and updates until April 2025. This guide…
What is Open-Source
Open-source is a term used to describe computer programs that have source code that’s available to study, modify, and share. Open-source software can be used for any purpose, studied and…
Crontab – Quick Reference
Setting up cron jobs in Unix, Solaris & Linux Cron is a Unix, Solaris, Linux utility that allows tasks to be automatically run in the background at regular intervals by…
Remove Key Password with OpenSSL
How do you remove a password from a .key file using OpenSSL. You will be prompted for your original password, so enter that first then the new key will be…
How to Force User to Change Password at Next Login in Linux
Using the passwd command, you can change a user’s password and settings related to password expiry. There are two possible ways to achieve this, as described in detail, below. Using…
How to enable/disable the firewall on Ubuntu 20.04 LTS
In this tutorial, you will learn: The default Ubuntu firewall is ufw, with is short for “uncomplicated firewall.” Ufw is a frontend for the typical Linux iptables commands, but it…
How to Fix “No route to host” SSH Error in Linux
SSH is the most secure means of connecting to Linux servers remotely. And one of the common errors encountered while using SSH is the “ssh: connect to host port 22:…