How to Configure TCP keepalive Settings on Ubuntu (and other Debian-based systems)
TCP keepalive is a feature used to detect and close inactive or unresponsive connections. It works by periodically sending a small packet called a “keepalive probe” to maintain the connection….
How to Install Traceroute on Linux (Ubuntu, CentOS, RHEL, Fedora)
Traceroute is a network diagnostic tool used to trace the route that packets take from your computer to a target destination (e.g., a website or another server). It can help…
How to Check if Telnet is Installed on a Linux System
Before attempting to install Telnet on a Linux system, it is a good idea to verify whether it is already installed or not. In this short guide, we will demonstrate…
How to Install Telnet on Linux (CentOS, RHEL) using the YUM package manager
Although Telnet is not considered the most secure protocol for remote access, it can still be helpful for certain network administration tasks, such as testing and troubleshooting network services. In…
How to Install Telnet on Windows, MacOS, Linux
Telnet is a network protocol that allows users to access and interact with remote computers over the internet. It was widely used before the advent of more secure protocols such…
How to Fix “Your connection isn’t private” in Microsoft Edge
When surfing the web using Microsoft Edge, you may encounter an error related to SSL certificates, such as “Your connection isn’t private” or “This site is not secure” (DLG_FLAGS_INVALID_CA or…
How to Fix “Your connection is not secure” in Firefox
When browsing the web using Firefox, you may encounter SSL certificate errors, such as “Your connection is not secure” (SEC_ERROR_UNKNOWN_ISSUER or SSL_ERROR_BAD_CERT_DOMAIN). These errors occur when Firefox cannot verify the…
How to Fix “Your connection is not private” Error in Google Chrome
When browsing the Internet using Google Chrome, you may encounter an error related to SSL certificates, such as “Your connection is not private” (NET::ERR_CERT_AUTHORITY_INVALID or NET::ERR_CERT_COMMON_NAME_INVALID). These errors occur when…
How to Check Kernel Version on Ubuntu
Understanding the version of the kernel your Ubuntu system is running can be crucial for many reasons. Whether you’re troubleshooting, installing new software, or ensuring compatibility with hardware, the kernel…
How to add SPF Record in Bind DNS Zone on Linux
In the world of email authentication, Sender Policy Framework (SPF) is a widely used protocol that helps prevent email spoofing and protects against forged sender addresses. By adding an SPF…
How to Uninstall Java JDK on Ubuntu
Java Development Kit (JDK) is a software development environment used for developing Java applications and applets. It includes the Java Runtime Environment (JRE), an interpreter/loader (Java), a compiler (javac), an…
How to Setup Apache Benchmark to Perform a Stress Test on Linux
Understanding how your web server reacts under heavy load is crucial in web hosting. Whether you’re using Apache, Nginx, or LiteSpeed, it’s essential to gauge the server’s performance. One of…