Linux awk and sed: Text Processing Power Tools
Master awk and sed for text processing on Linux. Learn pattern matching, field extraction, in-place editing, and real-world one-liners for log analysis.
·9 min read · #linux#awk#sed
#linux
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Linux systemd: Create and Manage Custom Services
Learn how to create, configure, and manage custom systemd service units on Linux. Covers unit files, dependencies, timers, and troubleshooting.
·8 min read · #linux#systemd#services
awk for Text Processing: A Practical Guide with Real Examples
Master awk for text processing on Linux with practical examples covering field extraction, pattern matching, and data transformation.
·7 min read · #linux#awk#text-processing
cgroups for Resource Isolation and Limits on Linux
Learn how to use Linux cgroups to limit CPU, memory, and I/O for processes, and understand their role in containers.
·6 min read · #linux#cgroups#containers
iptables and nftables Firewall Configuration on Linux
Learn how to configure Linux firewalls with iptables and nftables, including rules, chains, NAT, and migration strategies.
·7 min read · #linux#iptables#nftables
Linux Namespaces: The Building Blocks of Containers
Understand Linux namespaces and how they provide process isolation for containers, with hands-on examples using unshare.
·8 min read · #linux#namespaces#containers
Linux Performance Tuning with sysctl Parameters
Learn how to tune Linux kernel parameters with sysctl for better network, memory, and filesystem performance.
·6 min read · #linux#performance#sysctl
sed for Stream Editing and Text Transformation
Learn how to use sed for find-and-replace, line editing, and text transformation in Linux with practical examples.
·7 min read · #linux#sed#text-processing
SSH Tunneling and Port Forwarding Explained
Learn how to use SSH local, remote, and dynamic port forwarding to securely access services across networks.
·7 min read · #linux#ssh#networking
strace for System Call Debugging on Linux
Learn how to use strace to trace system calls, debug application issues, and understand what your programs are doing under the hood.
·7 min read · #linux#strace#debugging
Writing and Managing systemd Service Files
Learn how to create, configure, and manage custom systemd service files for running your applications as Linux services.
·6 min read · #linux#systemd#services
tmux for Terminal Multiplexing and Productivity
Master tmux for managing multiple terminal sessions, persistent remote work, and an efficient command-line workflow.
·7 min read · #linux#tmux#terminal
Linux Process Management
A comprehensive guide to Linux process management: ps, top, kill, signals, systemd services, cgroups, resource limits, and the tools you need to keep systems running.
·9 min read · #linux#processes#intermediate
Docker Overlay Filesystem Explained: Layers, lowerdir, upperdir
How Docker's overlay2 storage driver stacks read-only image layers under a writable container layer. Learn the directory anatomy and the copy-on-write behavior.
·4 min read · #docker#overlayfs#storage
Linux cgroups Explained: How Containers Get Their Limits
A practical introduction to Linux control groups. Learn what cgroups do, how v1 and v2 differ, and how Docker and Kubernetes use them to cap CPU and memory.
·5 min read · #linux#cgroups#containers
Linux Disk Management and LVM: A Hands-on Tutorial
Partition disks, build LVM volume groups, grow filesystems online, and recover safely. The Linux storage stack from physical disks to mounted paths.
·4 min read · #linux#lvm#storage
Linux Cron and systemd Timers: A Practical Comparison
Run scheduled jobs on Linux with cron or systemd timers. How they differ, when to choose each, and recipes that survive reboots and log rotations.
·4 min read · #linux#cron#systemd
Linux File Permissions: A chmod and chown Deep Dive
Understand the Linux permission model from user/group/other to setuid and sticky bits, with practical chmod and chown patterns you can use today.
·5 min read · #linux#permissions#chmod
Linux find and xargs Tutorial
Master find and xargs to locate files and run bulk operations safely. Includes -exec vs xargs, null-delimited pipelines, parallelism, and how to avoid destroying directories.
·4 min read · #linux#find#xargs
Linux iptables Firewall Basics
Learn iptables tables, chains, and rules. Build a working host firewall, understand NAT, and avoid the most common mistakes that lock you out.
·5 min read · #linux#iptables#firewall
Linux Logging with journalctl: Filters, Fields, and Forwarding
Master systemd's journal: query logs with structured filters, tail in real time, persist across reboots, and forward to a central collector.
·4 min read · #linux#systemd#journalctl
Linux Network Namespaces Tutorial
Hands-on guide to Linux network namespaces. Create isolated network stacks, connect them with veth pairs, and understand how containers get networking.
·4 min read · #linux#networking#namespaces
Linux Networking with ip and ss: The Modern Toolkit
Replace ifconfig and netstat with ip and ss. Learn to inspect interfaces, routes, and sockets on modern Linux with clear examples.
·5 min read · #linux#networking#ip
Linux Package Managers: apt vs yum
A practical comparison of apt and yum/dnf: how they resolve dependencies, where packages come from, command equivalents, and how to avoid breaking your system.
·4 min read · #linux#apt#yum
Linux Process Management Explained: ps, top, kill, and Beyond
Learn how Linux processes work, how to inspect them with ps and top, and how to control them with signals so your servers stay responsive.
·5 min read · #linux#processes#bash
Linux SSH Port Forwarding Tutorial
Learn local, remote, and dynamic SSH port forwarding with practical examples. Tunnel databases through bastions, expose local apps, and build SOCKS proxies safely.
·4 min read · #linux#ssh#networking
Linux strace Tutorial: See What Your Process Is Really Doing
Use strace to inspect every system call a process makes. Learn the essential flags, how to filter noise, and the patterns for debugging hangs, slowness, and crashes.
·5 min read · #linux#strace#debugging
systemd Service Units: A Practical Tutorial
Write, install, and operate systemd service units the right way. Learn unit syntax, restart policies, logging with journalctl, and common gotchas.
·4 min read · #linux#systemd#services
Linux tmux and screen Tutorial: Persistent Terminal Sessions
A practical guide to tmux and GNU screen for persistent shells, splits, and remote workflows, with side-by-side commands and tips for daily use.
·5 min read · #linux#tmux#screen
Linux systemd Services: A Practical Guide
Write, enable, and debug systemd services on Linux. Learn unit files, dependencies, restart policies, and journalctl logs through a small hands-on example.
·5 min read · #devops#linux#systemd
Linux Cron Jobs and systemd Timers
Master scheduled tasks on Linux. Learn crontab syntax, fix common PATH and environment pitfalls, and use systemd timers as a modern alternative.
·6 min read · #linux#cron#intermediate
Linux Networking Commands: ip, ss, curl, dig
A practical guide to modern Linux networking tools. Learn ip, ss, curl, and dig to diagnose connectivity, inspect sockets, and resolve DNS issues fast.
·6 min read · #linux#networking#intermediate
Shell Scripting Basics: Your First Bash Script
Write your first bash scripts — shebangs, variables, arguments, conditionals, loops, command substitution, exit codes, and the safety line every script should start with.
·9 min read · #linux#beginners#bash
20 Essential Linux Commands Every Developer Should Know
Twenty commands that cover the overwhelming majority of day-to-day Linux work — navigation, file management, inspection, search, and processes — with runnable examples for each.
·10 min read · #linux#beginners#commands
Linux File Permissions Explained
Read every rwx string at a glance, change permissions with chmod (symbolic and numeric), change ownership with chown, and understand when to use sudo. With runnable examples.
·10 min read · #linux#beginners#permissions
Understanding the Linux File System
A practical tour of the Linux file system hierarchy — what /etc, /var, /home, /usr, and friends are actually for, and how paths, mounts, and hidden files work.
·10 min read · #linux#beginners#filesystem
The Linux Terminal: A Beginner's Guide
Open a terminal, read the prompt, and learn the handful of conventions that make every command-line tool consistent. The foundation for everything else you will do on Linux.
·9 min read · #linux#beginners#terminal
What is Linux? A Complete Introduction for Beginners
An honest, jargon-free introduction to Linux — what it actually is, how it differs from Windows and macOS, the role of distributions, and why developers gravitate toward it.
·9 min read · #linux#beginners#introduction