To use curl with HTTP/2 on MacOS X, you need to have a version of curl that supports HTTP/2 and a version of OpenSSL that supports ALPN (Application-Layer Protocol Negotiation). To check if your system meets these requirements, run the following command: curl –version If the output shows that curl supports HTTP/2, you can use … Read more
To install LXD container hypervisor on Ubuntu 16.04 LTS, follow these steps: Add the LXD PPA (Personal Package Archive) to your system: sudo add-apt-repository ppa:ubuntu-lxc/lxd-stable Update the package list: sudo apt update Install the LXD package: sudo apt install lxd Initialize LXD: sudo lxd init During the initialization process, you will be prompted to configure … Read more
To remove all old and outdated packages installed with Homebrew on MacOS, you can use the following command: brew cleanup This command will remove any older versions of installed packages, as well as any cache files, logs, and other unnecessary files. You can also use the brew upgrade command to upgrade all installed packages to … Read more
To exit from a virsh console session in KVM (Kernel-based Virtual Machine), you can use the CTRL + ] key combination. This will return you to the virsh prompt, allowing you to execute other commands or exit virsh entirely. Alternatively, you can type quit or exit at the virsh prompt to exit the virsh console … Read more
To check if a port is in use on a Linux or Unix machine, you can use the following command: lsof -i :port_number Replace port_number with the desired port number. The command will list all the processes using the specified port number. If no process is using the port, the command will return no results.
HTTP Strict Transport Security (HSTS) is a security feature that forces clients to communicate with a web server only over HTTPS, even if they try to access it via HTTP. This helps protect against man-in-the-middle attacks and other security threats. Here’s how to set up HSTS with the Lighttpd web server: Enable HTTPS on your … Read more
To add a directory to your $PATH environment variable on a Linux system permanently, you can edit the shell profile file. The exact file you need to edit depends on your shell. For the bash shell, you can add a directory to the $PATH environment variable by editing the .bashrc file in your home directory. … Read more
To install wget on RHEL/CentOS 6/7/8/9, you can use the yum package manager. Update the package repository: To ensure that you have the latest packages available, run the following command: sudo yum update Install wget: To install wget, run the following command: sudo yum install wget Verify the installation: You can verify that wget has … Read more
To pair Pi-hole with OpenVPN on Ubuntu or Debian Linux, you need to follow these steps: Install OpenVPN: Install OpenVPN on your Ubuntu or Debian Linux system by running the following command: sudo apt-get update && sudo apt-get install openvpn Download OpenVPN configuration files: Download the OpenVPN configuration files from your VPN provider. These files … Read more
A bash alias is a shorthand way to reference a longer command. Aliases can be created temporarily, but they will be lost when you log out or restart your computer. To create a permanent bash alias on Linux or Unix, follow these steps: Open your bash profile file: You can open your bash profile file … Read more