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

In Bash, you can use the basename command to get the base name of a file or directory name. The basic syntax is as follows: basename <path> For example, to get the base name of a file called /path/to/myfile.txt, you can use the following command: basename /path/to/myfile.txt This command will return “myfile.txt” You can also … Read more

You can use the find command in combination with the du command to recursively search a directory and find the largest file. The following command will search the current directory and its subdirectories, and display the largest file in human-readable format: find . -type f -exec du -Sh {} + | sort -rh | head … Read more

To install VIM enhanced on Fedora Linux 33/34, use the following command: sudo dnf install vim-enhanced This command will install the enhanced version of VIM, which includes additional features and functionality not found in the basic version. Once the installation is complete, you can start using VIM by running the command vim in the terminal.

To update installed packages for security on SUSE 15, you can use the zypper command-line tool. First, update the package lists by running the following command: sudo zypper refresh Then, to update all installed packages that have security updates available, run the following command: sudo zypper update –type patch If you want to update all … Read more

To secure Nginx with Let’s Encrypt on Ubuntu 18.04 using DNS validation, you will need to perform the following steps: Install certbot: sudo apt-get update sudo apt-get install certbot Install the certbot Nginx plugin: sudo apt-get install python3-certbot-nginx Run certbot and specify the domain name for your Nginx server: sudo certbot –nginx -d example.com Follow … Read more