In the world of Linux system administration, the ability to manage and troubleshoot network interfaces is a fundamental skill. There are situations where you might encounter connectivity issues, need to apply configuration changes, or simply want to reset a network interface to its default state. In such scenarios, the knowledge of how to gracefully restart …

Core dumps are binary files that contain the memory image of a crashed process, which can be invaluable for debugging purposes. To collect a core dump file in Linux, you need to configure your system to generate core dumps when a program crashes. By default, many Linux distributions disable core dumps to save disk space …

The systemctl command is a powerful tool in Linux systems that serves as the interface to control and manage the systemd init system. It is a central component responsible for initializing, managing, and maintaining various system processes and services during the boot process and while the system is running.  With systemctl, users can start, stop, …

The “too many logins for user” error occurs when a user attempts to log in to a Linux system but is denied access due to reaching the maximum allowed number of concurrent (simultaneous) login sessions. Here’s an example scenario: Let’s say we have a user named “alice” on a Linux system, and the system administrator …

Microsoft’s Email Breach: Implications for Cloud Security On July 11, Microsoft disclosed that a Chinese hacking group known as Storm-0558 gained unauthorized access to the email systems of various US government agencies, potentially compromising a significant number of emails. Recent reports have emerged, suggesting that the email account of the US ambassador and other high-ranking …

The “wget failed: Connection timed out” error occurs when wget is unable to establish a connection to the server within the specified timeout period. This can happen due to various reasons, such as network issues, firewall settings, or problems on the server-side. Here are some steps you can take to troubleshoot and fix this issue: …

The error message “wget: command not found” is a common response you may encounter when attempting to run the wget command in your terminal or command prompt. This error occurs when the system cannot find the wget command because it is not installed or not available in the system’s PATH.. Here’s what the error message …

The “unable to resolve host address” error in wget occurs when the tool is unable to resolve the domain name of the host you’re trying to access. This could be due to various reasons, such as DNS server issues, network connectivity problems, or incorrect URLs. 10 ways to fix unable to resolve host address in …

The error “Unable to locally verify the issuer’s authority” means wget cannot verify the SSL certificate of the website you’re trying to connect to. This usually happens when wget doesn’t have access to the necessary CA certificates to verify the website’s certificate. Here are a few possible ways to resolve the issue: Install/Update the CA …

Network command in Linux ifconfig Display network interface configuration. ip addr Show IP addresses and network interfaces. ip route Display the routing table. ping Test network connectivity to a host. traceroute Trace the route packets take to a host. netstat Show network statistics and connections. ss Similar to netstat, show socket statistics. nslookup Query DNS …