Tutorials

Step-by-step technical guides on Docker, Linux, Python, Go, and more.

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docker logging devops containers syslog
6 min readIntermediate

Docker Logging Drivers: Configuration and Log Management (2026)

Configure Docker logging drivers in 2026. json-file, syslog, journald, fluentd setup. docker logs command with --tail, --follow, --since. Log rotation best practices.

docker docker image size multi-stage build alpine dockerfile
7 min readIntermediate

How to Reduce Docker Image Size: Multi-Stage Builds and Best Practices (2026)

Reduce Docker image size in 2026 with multi-stage builds, Alpine base images, .dockerignore, layer caching, RUN chaining, and the dive tool. Before/after examples included.

golang go rune string unicode
5 min readBeginner

Go: Convert Rune to String and String to Rune — Complete Guide (2026)

Convert rune to string in Go with string(r). Convert string to rune slice with []rune(s). Covers Unicode, utf8 package, for range iteration, and rune vs byte.

golang go string int conversion
6 min readBeginner

Go: Convert String to Int (and Int to String) — Complete Guide (2026)

Convert string to int in Go using strconv.Atoi, strconv.ParseInt, fmt.Sscanf. Convert int to string with strconv.Itoa, FormatInt, Sprintf. All methods compared.

golang go modules go.mod go.sum
5 min readBeginner

go mod tidy Explained: Clean Up Go Module Dependencies (2026)

go mod tidy adds missing and removes unused dependencies from go.mod and go.sum. Learn go mod download, verify, vendor, -e flag, and common post-tidy errors.

hashcat rules password cracking best64 rule-based
7 min readIntermediate

Hashcat Rule-Based Attacks: Crack Complex Passwords (2026 Guide)

Complete guide to Hashcat rule-based attacks. Learn built-in rules (best64, rockyou-30000), write custom rules, and use OneRuleToRuleThemAll. Updated March 2026.

hashcat hydra password cracking online attack offline attack
6 min readBeginner

Hashcat vs Hydra: Which Password Tool Should You Use? (2026)

Hashcat vs Hydra compared: offline vs online cracking, speed, use cases, and when to use each. Includes Hydra syntax for SSH, FTP, HTTP and Hashcat examples. Updated 2026.

hashcat wordlist rockyou password cracking md5
7 min readBeginner

Hashcat Wordlist Attack Tutorial 2026: Crack MD5, NTLM, WPA2 with rockyou.txt

Hashcat wordlist attack step-by-step: crack MD5, NTLM, and WPA2 hashes using rockyou.txt. Copy-paste commands with real output. Covers -a 0, rules, mask attacks, and cracking WPA2 .hccapx files. Kali Linux 2026.

nessus ubuntu install vulnerability scanner tenable
6 min readBeginner

How to Install Nessus on Ubuntu 22.04 / 24.04 (2026 Guide)

Step-by-step guide to install Nessus on Ubuntu 22.04 and 24.04 in 2026. Download .deb, dpkg install, start service, activate Essentials free tier, run first scan.

linux wifi networking iwconfig iw
5 min readBeginner

iwconfig vs iw: Which WiFi Command to Use in Linux 2026

Learn why iwconfig is deprecated and when to use iw instead. Covers scanning, signal check, monitor mode, channel config with real command examples.