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Guides on Linux, system administration, web development, and engineering craft.

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How I Cut 89% of Unused JavaScript from a Production AI App

A deep dive into how I eliminated 241 KiB of dead JavaScript and reduced main-thread blocking time by 70% at Kumari.ai without rewriting a single feature.

Feb 18, 2026

6 min read

linuxLinuxDisk ManagementDevOps

Linux Disk Management: df, du, fdisk, parted, mount, and LVM Basics

Master Linux disk management including disk usage with df and du, partitioning with fdisk and parted, mounting filesystems, and LVM for flexible storage.

Jan 23, 2026

9 min read

linuxLinuxEnvironmentBash

Linux Environment Variables: PATH, HOME, USER, and Shell Configuration

Master Linux environment variables including PATH, HOME, USER, SHELL, setting variables, .bashrc, .profile, and environment variable best practices.

Jan 23, 2026

8 min read

linuxLinuxPermissionsSecurity

Linux File Permissions: chmod, chown, umask, SUID, and ACLs Explained

Master Linux file permissions including chmod, chown, umask, special permissions (SUID, SGID, sticky bit), and access control lists (ACLs) with practical examples.

Jan 23, 2026

11 min read

linuxLinuxFile ManagementSearch

Linux File Searching: find, locate, which, whereis, and grep Recursively

Master Linux file searching commands including find with multiple criteria, locate for fast searches, which for command location, and recursive file discovery.

Jan 23, 2026

9 min read

linuxLinuxFilesystemDevOps

Linux Filesystem Structure: Complete Directory Hierarchy Guide

Master the Linux filesystem hierarchy from root (/) to /usr, /etc, /var, /home, and all major directories. Understand the FHS standard with practical examples.

Jan 23, 2026

10 min read

linuxLinuxNetworkingDevOps

Linux Networking: ip, ping, traceroute, netstat, ss, dig, curl, and wget

Master Linux networking commands including network configuration with ip, connectivity testing, DNS resolution, port analysis, and network debugging tools.

Jan 23, 2026

8 min read

linuxLinuxPackage ManagementDevOps

Linux Package Managers: apt, apt-get, yum, dnf, and pacman Explained

Master Linux package managers including apt/apt-get for Debian/Ubuntu, yum/dnf for RHEL/CentOS, pacman for Arch, and building from source with autotools.

Jan 23, 2026

8 min read

linuxLinuxProcessesSystem Administration

Linux Process Management: ps, top, htop, kill, bg, fg, and Process Priorities

Master Linux process management including viewing processes with ps, top, htop, sending signals with kill, background/foreground jobs, nice, and understanding process states.

Jan 23, 2026

9 min read

linuxLinuxBashScripting

Shell Scripting Basics: Bash Variables, Conditionals, Loops, Functions, and Error Handling

Master Bash shell scripting including variables, conditionals (if/case), loops (for/while), functions, command substitution, arrays, error handling, and practical examples.

Jan 23, 2026

10 min read

linuxLinuxSystemDServices

Linux System Services: systemctl, journalctl, and systemd Unit Files

Master systemd service management including systemctl commands, systemd unit files, journalctl logging, and creating custom services for DevOps.

Jan 23, 2026

8 min read

linuxLinuxText ProcessingCommand Line

Linux Text Processing: grep, sed, awk, cut, sort, uniq, and Regular Expressions

Master Linux text processing commands including grep for searching, sed for stream editing, awk for data transformation, and text manipulation tools with practical examples.

Jan 23, 2026

8 min read

linuxLinuxUsersGroups

Linux Users and Groups: Complete Administration Guide

Master Linux user and group management including useradd, usermod, userdel, passwd, sudoers configuration, and understanding /etc/passwd and /etc/shadow files.

Jan 23, 2026

10 min read