linux

Technical comparison of Windows and Linux update architectures explaining why Windows requires reboots while Linux allows live updates.

Learn how to view live MySQL queries on Linux using mysql show processlist, performance schema, and query logging. Monitor database activity in real-time for optimization and troubleshooting.

Learn how to download Java JDK on Linux using wget by bypassing Oracle's license page. Step-by-step methods with cookie headers and installation guide.

Fix iptables -C 'Bad rule (does a matching rule exist?)' error for NAT PREROUTING REDIRECT rules visible in -t nat -L. Learn table mismatch, --to-ports syntax, hostname resolution, nftables issues, and exact verification with -S and iptables-save.

Learn how to make cp create parent directories in Linux automatically. Fix 'no such file or directory' errors using mkdir -p with cp, install -D, or rsync -R for seamless file copying to non-existent paths.

Discover VS Code on Linux: ~/.config/Code holds settings.json, keybindings, and caches; ~/.vscode stores extensions. Safe deletion guide, what regenerates, reset steps, and management tips for troubleshooting and cleanup.

Explore security vulnerabilities and privilege escalation risks of disabling passwords on single-user Ubuntu without remote access. Analysis shows no new remote threats, physical access remains key concern with sudo NOPASSWD.

Learn why iptables -C command fails to recognize NAT rules and how to properly verify iptables NAT rules using the correct syntax with -t nat option.

Discover the top open-source speech-to-text tools for Linux with excellent Russian and English recognition accuracy. Learn which solutions guarantee complete data privacy.

Discover what the ^M character means in Vim—it's a carriage return from Windows CRLF line endings. Learn to remove ^M from .vimrc files using :%s/\r//g, :set ff=unix, or dos2unix to fix configuration issues and ensure Unix compatibility.

Ensure cron jobs run if PC sleeps using systemd timers with Persistent=true or anacron. Set up Time Machine-style versioned backups on Linux with Timeshift, rsync snapshots for incremental file versioning after wake-up.

Resolve Alt Linux Server 11 GNOME WiFi adapter not found issue. Change NM_CONTROLLED=yes in /etc/net/ifaces, diagnose with lspci, dmesg, nmcli. Safe fix for NetworkManager unmanaged interfaces.

How the Linux kernel build system uses built-in.a and KBUILD_VMLINUX_LIBS to link object files into vmlinux, and how built-in drivers differ from modules.

Master iptables rules for WireGuard wg0: drop all incoming packets except UDP port 51821. Why ACCEPT+DROP beats single negated rule. Avoid pitfalls like negation logic, rule ordering, connection tracking, INPUT vs FORWARD chains.

Learn why sudo chroot /mnt /bin/bash fails on Ubuntu with 'no files below /bin/bash' error. Fix by bind mounting /dev, /proc, /sys, /run, checking libraries with ldd, and copying resolv.conf. Step-by-step guide for chroot Ubuntu setups.

Learn to detect system clock tampering and time jumps in C++20 for cross-platform security agents. Use std::chrono::system_clock vs steady_clock polling, Windows Event ID 4616, Linux timerfd for reliable protection against clock manipulation.

Why JxBrowser's Chromium subprocesses show massive VIRT (32GB-1TB+) on Linux in top, VIRT vs RSS explained, and fixes: Chromium flags via EngineOptions, ulimit, cgroups, /dev/shm for Docker to prevent JavaFX JVM crashes.

Fix slow Ollama embeddings in ChromaDB on Linux VM without CUDA: batch requests, disable Posthog telemetry, ignore benign warnings. Run fully local for privacy and speed up email embedding performance.

Step-by-step guide to reformat HGST HUS723020ALS640 SAS drive from 520-byte to 512-byte sector size. Use IT-mode HBA, sg_format from sg3_utils, vendor tools. Hardware needs, RAID vs HBA, firmware risks explained.

Step-by-step guide to install and configure Gosplugin on Debian 12 with Yandex Browser for Gosuslugi access using electronic signatures. Fix infinite download loops, native messaging, and CryptoPro integration.