How do I fix the GPG error “NO_PUBKEY”?
I recently added some extra repositories with the Mysterium network and received this error when I reloaded the apt package database: To fix this, I found to execute the following…
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 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…
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:…
How to manually set up a Static or DHCP NIC in Ubuntu 20.04
How does it work? Netplan reads network configurations from /etc/netplan/*.yaml, written by administrators, installers, cloud image instantiations, or other OS deployments. During early boot, Netplan generates backend-specific configuration files in…
How to correctly add a path to PATH?
The simple stuff Depending on whether you want to add ~/opt/bin at the end (to be searched after all other directories, in case there is a program by the same…
Linux/Uniux Shells
The shell can be defined as a command interpreter within an operating system like Linux/GNU or Unix. It is a program that runs other programs. The shell facilitates every computer…