Posts (23+)

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July 2026

Linux ss and netstat:Monitor Network Connections

Hands-on ss and netstat recipes — list listening sockets, inspect open connections, check routing tables, and read interface statistics.

Linux

Linux kill, pkill, and killall:Send Signals Safely

Hands-on kill, pkill, and killall recipes — choose SIGTERM, SIGKILL, or SIGHUP, target the right PIDs, and stop processes without wrecking managed services.

June 2026

Linux

Linux lsof:See Who Is Using a File or Port

Hands-on lsof recipes for everyday work — find which processes hold files open, bind ports, or leak file descriptors.

Linux

Linux chmod, chown, and umask:Control Who Can Touch a File

Hands-on chmod, chown, and umask recipes — decode numeric vs symbolic modes, fix ownership, and understand default permissions for new files.

Linux

Linux xargs:Turn Lists into Command Arguments

Hands-on xargs recipes for everyday work — feed find and grep into commands, batch safely, and place arguments where they belong.

Linux

Linux journalctl:Query the systemd Journal

Hands-on journalctl recipes for everyday work — filter by unit, severity, time range, and boot, then read the results with confidence.

Linux

Linux sed:Edit Streams Without Opening an Editor

Hands-on sed recipes for everyday work — substitute text, delete lines, edit files in place, and reshape output in pipelines.

Linux

Linux ps and pgrep:Find Running Processes

Hands-on ps and pgrep recipes — locate processes by PID, user, memory footprint, or command path without a live monitor.

May 2026

Linux

Linux dmesg:Read the Kernel Ring Buffer

Hands-on dmesg recipes for everyday work — inspect boot messages, chase hardware faults, filter by level, and watch the kernel live.

Linux

Linux top, htop, and btop:Watch CPU, RAM, and Load

Hands-on top, htop, and btop recipes — read load averages, find CPU and memory hogs, and triage a busy box in real time.