When you resize a disk volume on a Linux system, the file system on that volume may not automatically adjust to the new size. To extend the file system to use the new space, you can use the resize2fs command. Here are the general steps to extend a file system after resizing a disk volume: … Read more
To update the firmware on a Lenovo ThinkPad X1 Extreme or P1 Gen 2 on Linux, you can use the fwupd tool. Here are the steps to update the firmware: Install the fwupd package on your Linux system, if it’s not already installed. On Ubuntu or Debian, you can install it with: sudo apt-get install … Read more
To set up and use LXD on CentOS 8.x / RHEL 8.x, you can follow these steps: Install the lxd package using the package manager: sudo dnf install lxd Initialize LXD: sudo lxd init Start the lxd service: sudo systemctl start lxd Verify that the service is running: sudo systemctl status lxd Create a new … Read more
The DEBIAN_FRONTEND variable is an environment variable that controls the user interface used by the apt-get package manager on Ubuntu and Debian systems. It is used to specify the type of user interface that should be used when running apt-get commands. There are three main options for the DEBIAN_FRONTEND variable: noninteractive: This option tells apt-get … Read more
Firewalld is a firewall management tool for Linux systems that uses dynamic firewall rules. To enable logging for denied packets in Firewalld, you will need to make some changes to the Firewalld configuration. First, you need to set the log level to “debug” or “info”. You can do this by running the following command: sudo … Read more
In Linux, the net.ipv4.ip_nonlocal_bind sysctl variable controls whether or not a process can bind to an IP address that does not exist on the local system. By default, this variable is set to 0, which means that a process cannot bind to an IP address that does not exist on the local system. To allow … Read more
You can configure Vim to show line numbers by default on Linux by editing the Vim configuration file, .vimrc. Here are the steps to do this: Open a terminal window and navigate to your home directory by running the command cd ~. Check if the .vimrc file exist in your home directory using the command … Read more
The chsh command (short for “change shell”) allows you to change the default shell for a user in Linux. Here are the steps to change your default shell using chsh: Open a terminal window Run the command cat /etc/shells, this will list the available shells on your system, make sure the shell you want to … Read more
In Linux, you can use the iptables command to manage the firewall rules. To delete a prerouting rule, you can use the -D option, followed by the table, chain, and rule number. For example, to delete a prerouting rule in the nat table, in the PREROUTING chain, with a rule number of 2, you would … Read more
UFW (Uncomplicated Firewall) is a firewall management tool for Ubuntu 20.04 LTS. It is a command-line tool that makes it easy to configure and manage iptables, the Linux kernel’s built-in firewall. Here are the steps to configure the firewall with UFW on Ubuntu 20.04 LTS: Install UFW by running the following command: sudo apt install … Read more