To check open ports in Linux using the command line interface (CLI), you can use the “netstat” command. This command will show you all the active network connections, including information about the protocol (TCP or UDP), the local and remote addresses and ports, and the state of the connection. To check all open ports, use … Read more

To disable SELinux on CentOS 7, RHEL 7, or Fedora Linux, you can use the following steps: Open the SELinux configuration file: sudo nano /etc/selinux/config Change the SELINUX value to “disabled” SELINUX=disabled Save and close the file Reboot the system for the changes to take effect sudo reboot Note: Disabling SELinux may weaken the security … Read more

To set up automatic updates for Ubuntu Linux 18.04, you can use the unattended-upgrades package. First, make sure that the package is installed by running: sudo apt-get update sudo apt-get install unattended-upgrades Next, open the configuration file: sudo nano /etc/apt/apt.conf.d/50unattended-upgrades In the file, uncomment the line that starts with “//Unattended-Upgrade::Origins-Pattern”. This will allow the package … Read more

  To install LAMP (Linux, Apache, MySQL, PHP) on Debian 10 (Buster), you can use the following steps: Install Apache web server: sudo apt-get update sudo apt-get install apache2 -y Install MySQL server: sudo apt-get install mysql-server -y Install PHP and necessary modules: sudo apt-get install php php-mysql libapache2-mod-php -y After installation, start Apache and … Read more

To delete a UFW firewall rule on Ubuntu or Debian Linux, you can use the ufw command with the delete option. For example, if you want to delete a rule that allows incoming traffic on port 22 (SSH), you can use the following command: sudo ufw delete allow 22 Alternatively, you can also use the … Read more

Setting up an OpenVPN server on Debian 10 can be done in just a few minutes using the following steps: Install OpenVPN by running the command sudo apt-get install openvpn Create a directory to store the server configuration files by running the command sudo mkdir /etc/openvpn/server Generate the server’s private key and certificate by running … Read more

First, make sure that your current system is up-to-date by running the following command: sudo apt-get update && sudo apt-get upgrade Then, backup all important data and configurations from your current system. Next, run the following command to upgrade your system to Debian 10: sudo apt-get install -y upgrade Now, Run the following command to … Read more

You can change the hostname on Debian 11/10 Linux using the following steps: Open a terminal and use the command hostnamectl set-hostname new_hostname where new_hostname is the new hostname you want to set. Edit the file /etc/hosts and change the old hostname to the new hostname in the line starting with 127.0.1.1 Edit the file … Read more

You can install vnStat on Fedora Linux using the following steps: Install vnStat package: To install vnStat, use the following command: sudo dnf install vnstat Create a database: Once the installation is complete, create a database for vnStat to store the network traffic data by running the following command: sudo vnstat -u -i <interface> Replace … Read more

To change the default shell to bash on macOS Ventura or Monterey, you can use the chsh command. This command allows you to change the login shell for a user. Open the terminal by searching for “terminal” in Spotlight or by using the command + spacebar shortcut. Type the following command and press enter: chsh … Read more