To change the theme in Ubuntu 16.04 or 17.10, you can follow these steps: Open the Unity Dash and search for “Appearance “. Open the Appearance Settings. In the Appearance Settings window, click on the ” Themes ” tab. You will see a list of available themes. To select a different theme, simply click on … Read more

To update your Ubuntu system using the terminal command line, follow these steps: Open a terminal window. Update the package index: sudo apt update Upgrade all installed packages to the latest available version: sudo apt upgrade After the upgrade process is completed, you can use the apt list –upgradable command to verify that all upgrades … Read more

To change the root password on Fedora Linux, you need to log in as the root user or use sudo to run the following steps: Open a terminal window. Type the following command to change the root password: sudo passwd Enter the current root password, and then follow the prompts to enter and confirm the … Read more

The Meltdown and Spectre vulnerabilities affect many modern computer systems, including those running FreeBSD. The following are the steps to patch these vulnerabilities on a FreeBSD system: Ensure that your system is running the latest version of FreeBSD. The Meltdown and Spectre vulnerabilities were addressed in FreeBSD releases 11.1-RELEASE and later. You can check your … Read more

To update installed packages for security in Ubuntu 18.04, you can use the following steps: Open the terminal. Update the package index: sudo apt update Upgrade all installed packages to the latest available version, including security updates: sudo apt upgrade To update the installed packages specifically for security, you can use the following command: sudo … Read more

To set the hostname (computer name) of an Ubuntu system permanently, you need to modify two files: /etc/hostname and /etc/hosts. Here’s how to set the hostname in Ubuntu: Open the terminal. Use the following command to open the /etc/hostname file in a text editor: sudo nano /etc/hostname Enter the desired hostname in the file and … Read more

To redirect a non-www domain to a www domain over SSL in Nginx, you need to configure a server block in your Nginx configuration file. Here’s an example of how to do it: Open the Nginx configuration file in a text editor: sudo nano /etc/nginx/nginx.conf Add the following code to the file, replacing example.com with … Read more

The dig command is not included in the default installation of Red Hat Enterprise Linux 8 (RHEL 8). However, you can install it using the package manager, dnf. Here’s how to install dig on RHEL 8: Log in to the RHEL 8 server as a root user or with sudo privileges. Run the following command … Read more

To find the IP address of a Linux KVM guest virtual machine, you have several options: Check the DHCP server logs: If the virtual machine is configured to obtain its IP address from a DHCP server, you can check the DHCP server logs to find the assigned IP address. The location of the logs may … Read more

To find the serial number of a Lenovo laptop from Linux, you can use the dmidecode tool. dmidecode is a tool for reading the System Management BIOS (SMBIOS) table, which contains information about the system’s hardware components, including the serial number. Here’s how to find the serial number of a Lenovo laptop from Linux: Open … Read more