Enabling kernel crash dump on Debian Linux involves several steps, here is an overview of the process: Install the kexec-tools package: sudo apt update sudo apt install kexec-tools Configure the kernel to use the kdump feature by adding the following line to the /etc/default/grub file: GRUB_CMDLINE_LINUX_DEFAULT=”crashkernel=128M” Update the grub configuration: sudo update-grub Configure the kdump … Read more
acme.sh is a command-line utility that can be used to issue and manage Let’s Encrypt SSL certificates. You can use acme.sh to convert an AWS Route53-managed domain to a Cloudflare-managed domain and complete the Let’s Encrypt DNS challenge. Here’s an example of how to do this: Install acme.sh: To get started, you will need to … Read more
The YubiKey Manager GUI is a graphical user interface for managing YubiKey devices on Linux. Here is how to install it on different Linux distributions: Ubuntu, Debian, Linux Mint: sudo apt install yubikey-manager-gui Fedora, CentOS, RHEL: sudo dnf install yubikey-manager-gui Arch Linux: sudo pacman -S yubikey-manager-gui Please note that the package name may vary depending … Read more
Whois is a command-line utility that allows you to look up information about domain names and IP addresses. On Ubuntu and Debian Linux, you can install whois using the package manager apt. Here’s an example of how to install whois on Ubuntu or Debian Linux: Update package list: Before installing whois, you should first update … Read more
Setting up an OpenVPN server on Ubuntu 22.04 LTS can be done in just a few minutes by following these steps: Install OpenVPN: sudo apt update sudo apt install openvpn Generate the necessary encryption keys and certificates: sudo easyrsa init-pki sudo easyrsa build-ca sudo easyrsa build-server-full server nopass This will create the necessary keys and … Read more
The “bash: add-apt-repository: command not found” error occurs when the add-apt-repository command is not found on your Ubuntu or Debian Linux system. This command is used to add a PPA (Personal Package Archive) to your system, allowing you to install software from a specific repository. To fix this error, you will need to install the … Read more
Upgrading to a new version of Ubuntu from the command line involves the following steps: Make sure your system is up-to-date: Before you begin the upgrade process, you should ensure that your system is fully up-to-date by running the command sudo apt update and sudo apt upgrade. This will update any existing packages to the … Read more
GIMP (GNU Image Manipulation Program) is a free and open-source image editing software that can be installed on Ubuntu or Debian Linux. Here’s an example of how to install GIMP 2.10 on Ubuntu or Debian Linux: Add the GIMP PPA: To install GIMP 2.10 on Ubuntu or Debian, you will first need to add the … Read more
Setting up an OpenVPN server on Debian 11 can be done in just a few minutes by following these steps: Install OpenVPN: sudo apt update sudo apt install openvpn Generate the necessary encryption keys and certificates: sudo easyrsa init-pki sudo easyrsa build-ca sudo easyrsa build-server-full server nopass This will create the necessary keys and certificates … Read more
The “file_get_contents(): https:// wrapper is disabled in the server configuration” error message occurs when the function file_get_contents() is used to access a file over HTTPS, but the server configuration does not have the https wrapper enabled. This error occurs because PHP needs to access the file over a secure connection, but the server does not … Read more