Tech Docs
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Learn Bash commands and paths: pwd, ls, cd, absolute and relative paths, ., .., ~, PATH command lookup, command -v, type, and how to troubleshoot command-not-found errors.
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Learn the SQL WHERE clause: filter rows with comparisons, combine conditions with AND, OR, and NOT, use parentheses safely, and handle NULL correctly.
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OpenMote puts modern ESP32-S3 electronics into an old Wii Remote shell, opening the door to DIY controllers for robots and smart-home projects.
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Learn PHP variables: the $ prefix, assignment, naming rules, case sensitivity, reassignment, dynamic typing, var_dump(), and clear beginner-friendly variable habits.
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Learn how Python LoggerAdapter and the extra parameter add request IDs, device IDs, user IDs, and other context to log records without turning every message into manual string formatting.
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Learn how HTML elements are formed, how start and end tags work, which elements are void, how nesting creates the document tree, and why semantic elements matter.
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Learn how to diagnose and repair a laptop screen, distinguish LCD faults from cable or graphics problems, match the correct replacement panel, disconnect power safely, and test the repair before reassembly.
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Learn JavaScript’s seven primitive types—String, Number, BigInt, Boolean, undefined, Symbol, and null—plus typeof, immutability, dynamic typing, and the famous typeof null quirk.
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Learn Java’s eight primitive types, variable declarations, literals, local-variable initialization, primitive vs. reference values, and how var keeps Java statically typed.
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Troubleshoot DHCP from the wire up: DORA, UDP 67/68, 169.254.x.x addresses, VLANs, DHCP relay, Cisco ip helper-address, packet capture, scope exhaustion, and verification.
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Learn Go variables, constants, zero values, type inference, short declarations, numeric types, booleans, strings, byte, rune, and the difference between typed and untyped constants.
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Learn how routers use routing tables, connected and static routes, next hops, default routes, longest-prefix matching, administrative distance, ping, traceroute, and show ip route.
