--- title: "#90daysofdevops-devopskajosh-trainwithshubham articles | Hashnode" description: "Explore 20 articles tagged #90daysofdevops-devopskajosh-trainwithshubham on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/90daysofdevops-devopskajosh-trainwithshubham" --- Tag # #90daysofdevops-devopskajosh-trainwithshubham 20 posts · 0 followers [Malathi Shetty](https://hashnode.com/@withmalathi) · [Apr 19](https://hashnode.com/posts/from-zero-to-understanding-dns-ips-cidr-subnets-ports/69e51e9213e74eec583aa52e) ### [From Zero to Understanding: DNS, IPs, CIDR, Subnets & Ports](https://90-days-devops-with-shubham.hashnode.dev/from-zero-to-understanding-dns-ips-cidr-subnets-ports?utm_source=hashnode&utm_medium=feed) When I first started learning networking, everything felt overwhelming — DNS, IPs, CIDR, subnets, ports. None of it made sense. But once I broke it down step by step, it all started connecting. Unders 14 min read · [90-days-devops-with-shubham.hashnode.dev](https://90-days-devops-with-shubham.hashnode.dev/from-zero-to-understanding-dns-ips-cidr-subnets-ports?utm_source=hashnode&utm_medium=feed) [Malathi Shetty](https://hashnode.com/@withmalathi) · [Apr 19](https://hashnode.com/posts/day-14a-networking-fundamentals/69e4a8e9ee84f66e944057c8) ### [Day 14a – Networking Fundamentals](https://90-days-devops-with-shubham.hashnode.dev/day-14a-networking-fundamentals?utm_source=hashnode&utm_medium=feed) Day 14a – Networking Fundamentals 3 min read · [90-days-devops-with-shubham.hashnode.dev](https://90-days-devops-with-shubham.hashnode.dev/day-14a-networking-fundamentals?utm_source=hashnode&utm_medium=feed) [Malathi Shetty](https://hashnode.com/@withmalathi) · [Apr 19](https://hashnode.com/posts/day-14d-what-really-happens-when-you-hit-a-url-step-by-step/69e4e54ba098742608a88665) ### [Day 14d –What Really Happens When You Hit a URL (Step-by-Step)](https://90-days-devops-with-shubham.hashnode.dev/day-14d-what-really-happens-when-you-hit-a-url-step-by-step?utm_source=hashnode&utm_medium=feed) Day 14d 1 min read · [90-days-devops-with-shubham.hashnode.dev](https://90-days-devops-with-shubham.hashnode.dev/day-14d-what-really-happens-when-you-hit-a-url-step-by-step?utm_source=hashnode&utm_medium=feed) [Malathi Shetty](https://hashnode.com/@withmalathi) · [Apr 19](https://hashnode.com/posts/day-14f-mini-task-port-probe-interpretation/69e4e585a098742608a8ac07) ### [Day 14f –Mini Task: Port Probe & Interpretation](https://90-days-devops-with-shubham.hashnode.dev/day-14f-mini-task-port-probe-interpretation?utm_source=hashnode&utm_medium=feed) Day 14f 5 min read · [90-days-devops-with-shubham.hashnode.dev](https://90-days-devops-with-shubham.hashnode.dev/day-14f-mini-task-port-probe-interpretation?utm_source=hashnode&utm_medium=feed) [Malathi Shetty](https://hashnode.com/@withmalathi) · [Apr 19](https://hashnode.com/posts/day-14e-how-to-debug-network-issues-like-a-devops-engineer/69e4e575a098742608a8a102) ### [Day 14e –How to Debug Network Issues Like a DevOps Engineer](https://90-days-devops-with-shubham.hashnode.dev/day-14e-how-to-debug-network-issues-like-a-devops-engineer?utm_source=hashnode&utm_medium=feed) Day 14e 21 min read · [90-days-devops-with-shubham.hashnode.dev](https://90-days-devops-with-shubham.hashnode.dev/day-14e-how-to-debug-network-issues-like-a-devops-engineer?utm_source=hashnode&utm_medium=feed) [Malathi Shetty](https://hashnode.com/@withmalathi) · [Apr 19](https://hashnode.com/posts/day-14c-where-http-tcp-ip-actually-sit-layer-mapping-simplified/69e4e3cca098742608a7b88e) ### [Day 14c –Where HTTP, TCP, IP Actually Sit (Layer Mapping Simplified)](https://90-days-devops-with-shubham.hashnode.dev/day-14c-where-http-tcp-ip-actually-sit-layer-mapping-simplified?utm_source=hashnode&utm_medium=feed) Day 14c – OSI vs TCP/IP + Protocol Mapping 3 min read · [90-days-devops-with-shubham.hashnode.dev](https://90-days-devops-with-shubham.hashnode.dev/day-14c-where-http-tcp-ip-actually-sit-layer-mapping-simplified?utm_source=hashnode&utm_medium=feed) [Malathi Shetty](https://hashnode.com/@withmalathi) · [Apr 19](https://hashnode.com/posts/day-14b-tcp-and-udp/69e4e366a098742608a76b74) ### [Day 14b –TCP and UDP](https://90-days-devops-with-shubham.hashnode.dev/day-14b-tcp-and-udp?utm_source=hashnode&utm_medium=feed) Day 14b – TCP vs UDP Explained Like Real Systems 4 min read · [90-days-devops-with-shubham.hashnode.dev](https://90-days-devops-with-shubham.hashnode.dev/day-14b-tcp-and-udp?utm_source=hashnode&utm_medium=feed) [Malathi Shetty](https://hashnode.com/@withmalathi) · [Apr 17](https://hashnode.com/posts/linux-lvm-lab/69e23a47fd22b8ad622b28b5) ### [Linux LVM Lab](https://90-days-devops-with-shubham.hashnode.dev/linux-lvm-lab?utm_source=hashnode&utm_medium=feed) Learning Resources 📖 Conceptual Understanding:👉 Understanding Linux Storage (AWS EBS + LVM) Learn how to: Add new disk (EBS in AWS) Create Physical Volume (PV) Create Volume Group (VG) Create 5 min read · [90-days-devops-with-shubham.hashnode.dev](https://90-days-devops-with-shubham.hashnode.dev/linux-lvm-lab?utm_source=hashnode&utm_medium=feed) [Malathi Shetty](https://hashnode.com/@withmalathi) · [Apr 17](https://hashnode.com/posts/understanding-linux-storage-aws-ebs-with-lvm/69e23ac7fd22b8ad622b9ca5) ### [Understanding Linux Storage & AWS EBS (With LVM)](https://90-days-devops-with-shubham.hashnode.dev/understanding-linux-storage-aws-ebs-with-lvm?utm_source=hashnode&utm_medium=feed) Imagine you are sitting in front of a brand-new Linux machine. No C drive.No D drive.No familiar structure. Instead, you see raw storage devices such as: /dev/xvda # older system /dev/nvme0n1 # modern 9 min read · [90-days-devops-with-shubham.hashnode.dev](https://90-days-devops-with-shubham.hashnode.dev/understanding-linux-storage-aws-ebs-with-lvm?utm_source=hashnode&utm_medium=feed) [Malathi Shetty](https://hashnode.com/@withmalathi) · [Apr 15](https://hashnode.com/posts/day-10-understanding-linux-file-permissions/69dfc73d46ad31000becb9bc) ### [Day 10 – Understanding Linux File Permissions](https://90-days-devops-with-shubham.hashnode.dev/day-10-understanding-linux-file-permissions?utm_source=hashnode&utm_medium=feed) When I started learning Linux, file permissions always felt confusing. That rwxrwxrwx format looked intimidating at first, but today (Day 10 of my DevOps journey), things finally started making sense. 3 min read · [90-days-devops-with-shubham.hashnode.dev](https://90-days-devops-with-shubham.hashnode.dev/day-10-understanding-linux-file-permissions?utm_source=hashnode&utm_medium=feed)