oathtool is a command-line utility that can be used to generate one-time passwords (OTPs) for two-step verification (2FA) on Linux. It can be used in combination with other tools and services to implement 2FA on your system. Here’s an example of how you can use oathtool to generate an OTP: First, you need to install … Read more
You can check running processes on Ubuntu using the command-line tool ps. The basic syntax for the ps command is: ps [options] Here are some common options for ps: -A or -e : shows all processes running on the system -aux : shows all processes running on the system with detailed information (user, pid, %cpu, … Read more
There are several ways to check if a port is in use on Linux. netstat command: The netstat command can be used to check the status of network connections and open ports. To check if a specific port is in use, you can use the following command: netstat -tuln | grep :<port_number> For example, to … Read more
The specific command to disable a firewall on Linux depends on the firewall software that is currently in use. Some common firewall software on Linux include: iptables: sudo iptables -F sudo iptables -X sudo iptables -t nat -F sudo iptables -t nat -X sudo iptables -t mangle -F sudo iptables -t mangle -X sudo iptables … Read more
To change the hostname (computer name) on Arch Linux, you can use the hostnamectl command or edit the /etc/hostname file directly. Using the hostnamectl command: sudo hostnamectl set-hostname new_hostname Editing the /etc/hostname file: sudo nano /etc/hostname change the hostname to your desired hostname save the file and exit update the hostname in /etc/hosts file sudo … Read more
There are several ways to check if a port is in use on Linux. netstat command: The netstat command can be used to check the status of network connections and open ports. To check if a specific port is in use, you can use the following command: netstat -tuln | grep :<port_number> For example, to … Read more
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