In Linux, the exit status of a command or shell script is a numeric value that represents the success or failure of the command or script. The exit status is stored in the special shell variable $?. A value of 0 indicates success, and any non-zero value indicates failure. For example, after running the command … Read more

To configure Pi-hole on Ubuntu to use Cloudflare’s DNS over HTTPS (DoH) service, you’ll need to follow these steps: Install Pi-hole on your Ubuntu system following the official installation guide. Once Pi-hole is installed and running, log in to the web interface and navigate to the “Settings” page. Scroll down to the “DNS” section, and … Read more

Red Hat Enterprise Linux 8 (RHEL 8) comes with Python 3 installed by default. However, if you need to install a specific version of Python 2, you can use the yum package manager to do so. To install Python 2.7 using yum, you can use the following command: sudo yum install python2 This command will … Read more

htop is a process monitoring tool that is similar to the top command, but with additional features such as the ability to scroll vertically and horizontally through the process list and the ability to sort processes by various criteria. To install htop on Alpine Linux using the apk package manager, you can use the following … Read more

You can find the Intel NUC BIOS version and model on Linux by running the following command in the terminal: sudo dmidecode -t system This command will provide detailed information about the system, including the BIOS version and the model of the Intel NUC. Look for the “BIOS Revision” and “Product Name” fields in the … Read more

In Debian and Ubuntu, the “perl: warning: Setting locale failed” message is usually caused by a lack of support for the locale that is specified in the system’s environment variables. This can happen when the locale is not installed on the system or when it is not configured correctly. To fix this issue, you can … Read more

To override the content type with Nginx web server, you can use the add_header directive in the server or location block of your Nginx configuration file. For example, to set the content type to application/json for all .json files, you can add the following in your server block: location ~* \.json$ { add_header Content-Type application/json; … Read more

Google Chrome is not available in the default CentOS 7 package repositories, so you will need to add the Google Chrome repository to your system in order to install it using the yum command. Here are the steps to install Google Chrome on CentOS 7 using yum: Create a file named “google-chrome.repo” in the “/etc/yum.repos.d/” … Read more

To force delete a directory in Linux, you can use the “rm” command with the “-r” (recursive) and “-f” (force) options. For example, to force delete a directory named “mydir”, you would use the following command: rm -rf mydir Please note that this command will delete the directory and all its contents without prompting for … Read more

You can check the Unix version using the command line by running the following command: uname -a This command will display the system’s name, version, and other information about the operating system. Alternatively, you can use the command: lsb_release -a It will show you the release version, codename and other details of the OS.