Linux From Scratch: A Practical Series

从 shell、文件、权限一路讲到 systemd、网络、SELinux、防火墙与容器边界。 25 篇实战笔记，每篇都有可复制的命令、真实故障的排查顺序与踩坑记录。

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25 issues2022 years

Latest issue

Linux Basics 25: Wrapping Up — Self-Audit Checklists And Where To Go Deeper

Four pre-flight checklists (accounts and permissions, services and boot, network and firewall, storage and backups), a symptom-to-first-command table, the directions worth going deeper into, and a debugging methodology to keep, as the close of the series.

1027 words 6 min read ...

202224 issues

  1. Linux Basics 24: Boot And Rescue — UEFI, GRUB, initramfs And Emergency Mode

  2. Linux Basics 23: Containers And Kernel Boundaries — Namespaces, Cgroups And What docker exec Does

  3. Linux Basics 22: Logs And A Debugging Method — Six Steps From Symptom To Root Cause

  4. Linux Basics 21: Scheduled Tasks — The Traps Of crontab And systemd Timers

  5. Linux Basics 20: Shell Scripting, Part Two — trap, Logging, Idempotence And Locking

  6. Linux Basics 19: Shell Scripting, Part One — Quoting, Tests And Exit Codes

  7. Linux Basics 18: Performance And Tracing — Where Is The Machine Actually Stuck

  8. Linux Basics 17: Firewalls — How iptables, nftables, firewalld And ufw Relate

  9. Linux Basics 16: SELinux — When Every Permission Is Correct And The Service Is Still Denied

  10. Linux Basics 15: Advanced Permissions — sudoers Wildcards, ACLs And Capabilities

  11. Linux Basics 14: SSH And Remote Operations — Keys, Permissions And Three Kinds Of Tunnel

  12. Linux Basics 13: Networking Fundamentals — Troubleshoot From The Bottom Up

  13. Linux Basics 12: Disks And Filesystems — From Block Device To Mount Point

  14. Linux Basics 11: systemd — units, systemctl And journalctl Done Properly

  15. Linux Basics 10: Package Management — What apt Actually Does, And The Four Common Errors

  16. Linux Basics 09: Users And Groups — passwd, shadow And sudoers

  17. Linux Basics 08: Environment Variables And Shell Startup Files — Why ssh Cannot Find Your PATH

  18. Linux Basics 07: Processes And Signals — The Real Difference Between TERM And KILL

  19. Linux Basics 06: Pipelines And Redirection — Three Streams, One Ordering Trap

  20. Linux Basics 05: Text Processing — Turning grep/sort/uniq Into Your Analysis Toolkit

  21. Linux Basics 04: Permissions And Ownership — rwx Is Not The Same On Files And Directories

  22. Linux Basics 03: The Real Semantics Of ls, cp, mv, rm — And The * That The Shell Expands

  23. Linux Basics 02: Why / Looks Like This, and What An Inode Really Stores

  24. Linux Basics 01: Terminals, Shells, and How Commands Are Actually Found

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