To rename a KVM virtual machine (VM) domain using the virsh command, you can follow these steps: Check the name of the virtual machine: sudo virsh list –all Shut down the virtual machine: sudo virsh shutdown <old-vm-name> where <old-vm-name> is the current name of the virtual machine. Rename the virtual machine: sudo virsh dominfo <old-vm-name> … Read more
To add a disk image to a KVM virtual machine using the virsh command, you can follow these steps: Attach the disk image to the virtual machine: sudo virsh attach-disk <vm-name> <disk-image-path> <target-dev> –subdriver qcow2 –cache none –persistent where <vm-name> is the name of the virtual machine, <disk-image-path> is the path to the disk image … Read more
To disable password authentication for SSH on Linux, follow these steps: Open the SSH configuration file: sudo nano /etc/ssh/sshd_config Find the line that says: #PasswordAuthentication yes Uncomment the line by removing the # character and change yes to no. It should look like this: PasswordAuthentication no Save the file and exit the editor. Restart the … Read more
To install Ansible on MacOS using the command line interface (CLI), you can use the Homebrew package manager. Here are the steps to install Ansible using Homebrew: Install Homebrew, if it’s not already installed on your MacOS system: /bin/bash -c “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)” Install Ansible using Homebrew: brew install ansible Verify the installation by checking … Read more
There are several ways to determine the version of Red Hat Enterprise Linux (RHEL) you are using: Using the lsb_release command: lsb_release -a The output will include a line indicating the distribution name and version, for example: Distributor ID: RedHatEnterpriseServer Description: Red Hat Enterprise Linux Server release 7.8 (Maipo) Using the /etc/redhat-release file: cat /etc/redhat-release … Read more
To enable console access for a KVM virtual machine (VM) managed by virsh on Ubuntu Linux, you need to perform the following steps: Connect to the virtual machine using virsh: virsh -c qemu:///system console <VM_name> Log into the virtual machine as the root user. Install the getty package, if it is not already installed: apt-get … Read more
To automatically start an LXD container at boot time on a Linux system, you need to configure the container to start automatically. Here are the steps to do this: Start the container: lxc start <container_name> Set the container to start automatically: lxc config set <container_name> boot.autostart true Restart the container to apply the change: lxc … Read more
To create a new configuration file in an Ansible playbook, you can use the template module. The template module allows you to copy a file from a source on the Ansible control machine to a destination on the remote host, while replacing variables in the source file with values specified in the playbook. Here is … Read more
Here are the steps to install and configure Varnish cache on Ubuntu 16.04 LTS: Install Varnish: sudo apt-get update sudo apt-get install varnish Edit the default Varnish configuration: sudo nano /etc/default/varnish Change the DAEMON_OPTS variable to listen on port 80: DAEMON_OPTS=”-a :80 \ -T localhost:6082 \ -f /etc/varnish/default.vcl \ -S /etc/varnish/secret \ -s malloc,256m” Configure … Read more
Here is a high-level overview of the steps to add an extra hard drive and increase the size of storage on Linux LVM: Prepare the new hard drive: Connect the new hard drive to your Linux system and use fdisk to create a new partition on the drive. Create a physical volume: Use the pvcreate … Read more