Focused on sharing practical Linux technology content, covering Linux fundamentals, applications, tools, as well as databases, operating systems, network security, and other technical knowledge.
PRemoteM is a modern, open‑source remote session manager for Windows that supports RDP, SSH, VNC, Telnet, SFTP/FTP, RemoteApp and more, offering a portable launcher, multi‑monitor support, customizable scripts, and easy migration from mRemoteNG.
This article provides a comprehensive guide to the Linux ls command, explaining its basic purpose and demonstrating twenty useful options—including long listing, human‑readable sizes, sorting, hidden files, recursive listing, and version display—complete with command examples and screenshot illustrations.
This article explains how to locate files and commands on a Linux system using utilities such as which, whereis, locate (with updatedb), and find with a wide range of options like -name, -size, -user, -perm, -type, -time, -inum, logical operators, and -exec, providing concrete command examples for each scenario.
This article walks through ten core Git commands—including merge, rebase, reset, revert, cherry‑pick, fetch, pull, and reflog—using animated GIFs and concrete examples to illustrate how each command manipulates branches, history, and repository state, helping readers visualize and retain the concepts.
This article presents ten advanced SQL concepts—including CTEs, recursive CTEs, temporary functions, CASE‑WHEN pivots, EXCEPT vs NOT IN, self‑joins, ranking window functions, delta calculations, cumulative sums, and date‑time manipulation—each explained with concrete examples and code snippets.
The article explains Linux virtual memory layout, shows that a 32‑bit process can create roughly 380 threads due to an 8 MB default stack, while a 64‑bit process can theoretically spawn millions of threads but is constrained by kernel parameters such as threads‑max, pid_max and max_map_count.
This article walks through how packet loss can occur at any layer of the Linux network stack, demonstrates using ethtool, netstat, iptables, tc and tcpdump to locate the issue, and shows how adjusting MTU and removing a netem rule fully resolves the problem.
Network monitoring is crucial for maintaining system security and performance, and this article introduces six free, open‑source tools—Zabbix, Prometheus, Cacti, Grafana, OpenNMS, and Nagios—detailing their core capabilities and why they are valuable for operations teams.
After adding an HTTPS certificate the site worked in browsers but curl requests were reset; through step‑by‑step network captures, buffer tweaks, cipher experiments and finally adding the missing ssl_session_cache directive, the author discovered the true cause and documented common Nginx error messages.
The article presents a collection of eighteen advanced Shell scripting techniques—including parallel execution, defensive error handling, performance tuning, streaming log analysis, Kubernetes automation, and AI‑assisted diagnostics—demonstrated with concrete code examples and practical guidelines to dramatically improve operational efficiency.
