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How to open DNS port 53 using ufw on Ubuntu/Debian Linux
To open port 53 for DNS on Ubuntu/Debian Linux using ufw, you can use the following command:rn rn rn sudo ufw allow 53/tcprnsudo ufw allow 53/udprn rn rnThis 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 fir
Linux list a KVM vm guest using virsh command
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. n To list all KVM guests that are currently running, you can use the following comman
How to reset a KVM clone virtual Machines with virt-sysprep on Linux
To reset a KVM clone virtual machine using the virt-sysprep command, follow these steps:rn rn First, shut down the virtual machine that you want to reset. rn Next, run the following command to reset the virtual machine: rn rn rn rn sudo virt-sysprep -d vmnamern rn rnWhere "vmname" is the name of the
How to add comments to iptables rules on Linux
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:rn rn rn iptables - A INPUT - p tcp --dport 22 -m comment
Bash get basename of filename or directory name
In Bash, you can use the basename command to get the base name of a file or directory name. n The basic syntax is as follows: n n n basename <path> n n n For example, to get the base name of a file called /path/to/myfile.txt , you can use the following command: n n n basename /path/to/myfile.t
Linux find largest file in directory recursively using find/du
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: n n n find . - type f - exec du -Sh {} +
How to install VIM enhanced on Fedora Linux 33/34
To install VIM enhanced on Fedora Linux 33/34, use the following command:rn rn rn sudo dnf install vim-enhancedrn rn rnThis 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 ca
SUSE 15 update installed packages for security
To update installed packages for security on SUSE 15, you can use the zypper command-line tool. n First, update the package lists by running the following command: n n n sudo zypper refresh n n n Then, to update all installed packages that have security updates available, run the following command:
Secure Nginx with Let’s Encrypt on Ubuntu 18.04 with DNS Validation
To secure Nginx with Let's Encrypt on Ubuntu 18.04 using DNS validation, you will need to perform the following steps:rn rn Install certbot: rn rn rn rn sudo apt - get update rnsudo apt - get install certbotrn rn rn rn Install the certbot Nginx plugin: rn rn rn rn sudo apt- get install python3-certb
curl hide progress bar output on Linux/Unix shell scripts
To hide the progress bar output when using the curl command in a Linux/Unix shell script, you can use the -s or --silent option. This will make the curl command run in silent mode, which means that it will not display any progress information or error messages. ( Diazepam ) n For example, if you wan
Install LXD pure-container hypervisor on Ubuntu 18.04 LTS
To install LXD pure-container hypervisor on Ubuntu 18.04 LTS, you can use the following steps: n n Add the LXD PPA (Personal Package Archive) to your system by running the command: sudo add-apt-repository -y ppa:ubuntu-lxc/lxd-stable n Update the package lists by running: sudo apt-get update n Insta
Linux mount an LVM volume / partition command
To mount an LVM volume or partition on Linux, you will first need to have the LVM utilities installed. You can install them using the package manager of your distribution. For example, on Ubuntu, you can use the command sudo apt-get install lvm2 . Once the LVM utilities are installed, you can use
How To Install and Configure TigerVNC server on Ubuntu
TigerVNC is a popular VNC server that allows you to remotely access the desktop of a Linux system. Here's how you can install and configure TigerVNC on Ubuntu:rn rn Install TigerVNC server by running the following command: rn rn rn rn sudo apt-get install tigervnc-standalone-server tigervnc-commonrn
Install and Configure Nginx on Ubuntu Linux 18.04 LTS
To install Nginx on Ubuntu 18.04 LTS, you can use the apt package manager. Here are the steps to install and configure Nginx on Ubuntu 18.04 LTS:rn rn Open a terminal and update the package index by running the command: rn rn rn rn sudo apt update rn rn rn rn Install Nginx by running the command: rn
Ubuntu Linux install Gnome desktop on server
To install the Gnome desktop on an Ubuntu Linux server, you can use the tasksel tool. Here are the steps to do this:rn rn Open the terminal and update the package list by running the following command: rn rn rn rn sudo apt updatern rn rn rn Install the tasksel package by running the following comman
Ubuntu Linux install OpenSSH server
To install OpenSSH server on Ubuntu Linux, you can use the apt package manager. Here are the steps to do this:rn rn Open the terminal and update the package list by running the following command: rn rn rn rn sudo apt updatern rn rn rn Install OpenSSH server by running the following command: rn rn rn
How to update source tree at /usr/src using svn on FreeBSD
command to update the source tree to the latest version. You can run it as follows:rn rn rn svn updatern rn rn rn If you want to update to a specific version, you can use the -r option followed by the version number: rn rn rn rn svn update -r <version number>rn rn rn rn If you want to update o
Linux mount an LVM volume / partition command
To install LXD (Linux Containers) on Ubuntu 18.04 LTS, you can use the following steps:rn rn Install the necessary packages: sudo apt install lxd lxd-client rn Initialize LXD by running sudo lxd init and following the prompts. You can choose to use the default settings or customize the storage pool
Ubuntu Linux Install Nvidia Driver (Latest Proprietary Driver)
To install the latest proprietary Nvidia driver on Ubuntu 18.04 LTS, you can use the following steps:rn rn Open a terminal window by pressing Ctrl + Alt + T. rn Stop the X server by running the command: sudo service lightdm stop rn Install the necessary dependencies by running the command: sudo apt-
How to install htop on macOS Unix desktop running on MacBook
Installing htop on macOS is a simple process that can be done using the Homebrew package manager. Here are the steps to install htop on macOS:rn rn Install Homebrew by running the following command in the terminal: rn rn rn rn /bin/bash -c " $(curl -fsSL https://raw.githubusercontent.com/Homebrew/in
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