To delete a KVM virtual machine guest using the virsh command, you can use the following steps: Connect to the host machine via ssh Start the virsh shell: virsh List all running VMs: virsh list –all Note the name or ID of the VM you want to delete. Destroy the VM: virsh destroy <name or … Read more

To automatically mount a ZFS file system on boot, you will need to create a new entry in the /etc/fstab file. The entry should include the following information: The ZFS file system’s name The mount point, the directory where the file system should be mounted The filesystem type, ZFS The options, default is rw The … Read more

To run commands on an LXD container instance at provision launch time, you can use cloud-init. Cloud-init is a tool that is commonly used to customize Linux instances when they launch in a cloud environment. It can be used to run commands, install packages, write files, and perform other tasks. Here is an example of … Read more

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To remove all old and outdated packages installed with Homebrew on MacOS, you can use the following command: brew cleanup This command will remove any older versions of installed packages,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