Let's Learn Linux: Customize or write simple scripts — Lesson 1/2

Learn how to customize or write simple scripts — this is lesson *105.2* from the LPIC-1 exam curriculum (102-500). We cover: Use standard sh syntax (loops, tests). Use command substitution. Test return values for success or failure or other information provided by a command. Execute chained commands. Perform conditional mailing to the superuser. Correctly select the script interpreter through the shebang (#!) line. Manage the location, ownership, execution and suid-rights of scripts. 📅 We go live *every Sunday at 19:00 CEST* — interactive, follow-along sessions where I expect you to participate and answer questions. No passive watching here. 📖 Official study material: https://linuxrenaissance.com/courses/... 💬 Homework & discussion: https://forum.linuxrenaissance.com/t/... --- 📺 All LPIC-1 101 lessons:    • LLL: LPIC-1 (101) v5.0   📺 All LPIC-1 102 lessons:    • LLL: LPIC-1 (102) v5.0   --- 🔴 *This stream is proudly sponsored by OPNsense* — the open source firewall and routing platform trusted by professionals worldwide. 👉 https://opnsense.org --- Support Linux Renaissance: 🛒 Shop: https://shop.linuxrenaissance.com ☕ Ko-fi: https://ko-fi.com/darth 🎖️ Patreon:   / membership   ▶️ YouTube membership:    / @linuxrenaissance   Find me elsewhere: 🌐 Blog: https://linuxrenaissance.com 🎥 PeerTube: https://watch.linuxrenaissance.com 📺 Odysee: https://odysee.com/@LinuxRenaissance:1 🎮 Twitch:   / linuxrenaissance   💬 Matrix: https://matrix.to/#/%23space:fosshq.org