Field notes from the terminal.
Long-form, slowly written essays on Linux, networking, DevOps, and the boring infrastructure that keeps the rest of it standing. No guides written by SEO. No newsletter signup.
Linux tutorials and DevOps guides — Linux administration, server security, bash scripting, Docker, SSH security, cron jobs, file permissions.- all
- automation
- cheat sheet
- devops
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- linux
- reference
- security
- ssh
Essential Linux Tools List: 50+ Must-Have Commands for Every Admin
A comprehensive list of essential Linux tools and commands organized by category — networking, file management, monitoring, security, and more.
written by K. Himananda · sysadmin, recovering kubernaut
- linux
Linux Tools Cheat Sheet: The Only Reference You Need
A concise, printable Linux command cheat sheet covering file ops, networking, permissions, processes, and more. Print it or bookmark it.
8 minK. HimanandaK. Himananda8 min · est. read - linux
Linux File Permissions Explained: A Complete Guide
Understand how Linux file permissions work — from the basics of read, write, and execute to advanced topics like setuid, setgid, sticky bits, and ACLs.
10 minK. HimanandaK. Himananda10 min · est. read - linux
Cron Jobs: The Complete Guide to Scheduling Tasks in Linux
Learn how to schedule automated tasks with cron — syntax, examples, common pitfalls, and best practices for production crontabs.
9 minK. HimanandaK. Himananda9 min · est. read - docker
Docker for Linux Admins: From Basics to Production
A practical guide to Docker for Linux administrators — containers, images, Dockerfiles, networking, volumes, and production deployment tips.
12 minK. HimanandaK. Himananda12 min · est. read - security
SSH Security Best Practices for Production Servers
Harden your SSH configuration with key-based authentication, port changes, fail2ban, jump hosts, and modern security techniques.
10 minK. HimanandaK. Himananda10 min · est. read - security
Linux Server Hardening Checklist: 20 Essential Steps
A practical checklist for securing Linux servers — from initial setup to firewall rules, kernel tuning, audit logging, and intrusion detection.
11 minK. HimanandaK. Himananda11 min · est. read