To reboot a Debian/Ubuntu Linux machine using Ansible and wait for it to come back online, you can use the “wait_for” module in combination with the “reboot” command. Here is an example playbook that demonstrates how to do this: – name: reboot and wait for Debian/Ubuntu Linux machine hosts: all tasks: – name: reboot the … Read more

To add an encrypted ZFS pool on a FreeBSD server, you will need to have the geli (GEom ELI) kernel module loaded and the geli utility installed. Here are the general steps to add an encrypted ZFS pool: Load the geli kernel module: kldload geom_eli Create a new GPT partition on the desired disk. This … Read more

Installing and configuring an OpenVPN client on OpenBSD involves several steps: Install the OpenVPN package by running the command pkg_add openvpn Create a directory to store the client configuration files, such as /etc/openvpn Obtain the client configuration files from your OpenVPN server, including the client certificate and key files. These should be placed in the … Read more

To add a cron job on an Asuswrt Merlin wifi router, you will first need to log in to the router’s web interface. Once logged in, navigate to the “Advanced Settings” page and then select “Cron.” From here, you can add a new cron job by entering the command you want to run, the schedule … Read more

To restart a Linux server using Putty SSH client on Windows, follow these steps: Open Putty and connect to your Linux server using the appropriate IP address, username and password. Once connected, enter the command “sudo reboot” and press Enter. This will initiate the reboot process. You will be prompted to enter your password again … Read more

To install Ansible on Ubuntu 18.04, you can follow these steps: Update the package index: sudo apt-get update Install the software-properties-common package to allow you to use the add-apt-repository command: sudo apt-get install software-properties-common Add the Ansible PPA (personal package archive) to your system: sudo add-apt-repository ppa:ansible/ansible Update the package index again: sudo apt-get update … Read more

To open port 53 for DNS on Ubuntu/Debian Linux using ufw, you can use the following command: sudo ufw allow 53/tcp sudo ufw allow 53/udp This will allow incoming and outgoing traffic on both TCP and UDP port 53, which is the standard port used for DNS. To check the status of your firewall rules, … Read more

You can use the virsh command to list virtual machines (VMs) managed by the libvirt virtualization library on a Linux system. The virsh list command is used to list the VMs that are currently running on the system. To list all KVM guests that are currently running, you can use the following command: virsh list … Read more

To reset a KVM clone virtual machine using the virt-sysprep command, follow these steps: First, shut down the virtual machine that you want to reset. Next, run the following command to reset the virtual machine: sudo virt-sysprep -d vmname Where “vmname” is the name of the virtual machine you want to reset. This will reset … Read more

To add comments to iptables rules on Linux, you can use the -m comment option. For example, to add a comment “Allow SSH” to an iptables rule that allows incoming traffic on port 22 (the default port for SSH), you can use the following command: iptables -A INPUT -p tcp –dport 22 -m comment –comment … Read more