angadsingh.hashnode.dev馃 DNS ExplainedWhat is DNS? Ever wondered what magical force lets you type google.com and instantly bring up the world鈥檚 most powerful search engine? No, it鈥檚 not unicorns or fairy dust. It鈥檚 something called DNS, the Domain Name System, aka the internet鈥檚 very own...Jul 10, 2025路4 min read
angadsingh.hashnode.devWhat is SELinux, and why does it matter?When we are talking about hardening a Linux box, there exists an interesting, frequently misunderstood, and most notably, an integrated-in-many-distributions tool SELinux (Security-Enhanced Linux). If we have servers deployed for enterprise applicati...Jun 28, 2025路4 min read
angadsingh.hashnode.devRecovering a Linux System After a Full Root PartitionRunning out of space on your Linux system鈥檚 root partition can lead to serious problems, including sudden shutdowns or boot failures. If your system is powered off due to a full root partition, there鈥檚 no need to panic鈥攖here are clear steps to recove...Sep 29, 2024路4 min read
angadsingh.hashnode.devTroubleshooting NTP Issues: How to Get Your Linux Server Back on Track?Introduction Time synchronization is critical for the smooth operation of servers, especially in environments where precision and coordination are paramount. Network Time Protocol (NTP) is the cornerstone of maintaining accurate system time across ne...Aug 3, 2024路3 min read
angadsingh.hashnode.devWhy Does the Linux Filesystem Go into Read-Only Mode and How to Resolve It in Various Versions (Ubuntu, RHEL)?Introduction Linux filesystems can switch to read-only mode due to various reasons, impacting the system's ability to write data and potentially causing service disruptions. Understanding the underlying causes and knowing how to address them in diffe...Jul 27, 2024路4 min read
