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{
"id": "03-commands",
"title": "Command mastery",
"icon": "⌨",
"level": "beginner",
"lessons": [
{
"id": "3.1",
"title": "Find any command fast",
"objective": "Use help, doctor and status to discover what exists before guessing.",
"minutes": 7,
"commands": [
"help",
"doctor",
"status"
],
"blocks": [
{
"type": "text",
"text": "`help` groups every registered command by the module that owns them."
},
{
"type": "cmd",
"text": "help"
},
{
"type": "cmd",
"text": "help webdav-push"
},
{
"type": "tip",
"text": "`doctor` shows module requirements — the fastest way to explain a command that is listed but not working."
}
],
"exercise": {
"instruction": "Run `doctor` and read its severity ranking.",
"accept": [
"doctor",
"help",
"status"
],
"check": {
"type": "command"
},
"hint": "Type: doctor"
},
"quiz": {
"q": "Which command shows usage for one command?",
"options": [
"help <cmd>",
"status",
"ls"
],
"answer": 0
},
"sources": [
"modules/core/module-system.js",
"modules/core/module-manager.js"
]
},
{
"id": "3.2",
"title": "Pipes, grep, sed, tail",
"objective": "Combine commands and understand the two semantics that bite: per-line sed and tail -f deltas.",
"minutes": 12,
"commands": [
"grep",
"sed",
"tail",
"sort",
"head"
],
"blocks": [
{
"type": "text",
"text": "Pipes feed one command into the next. `grep` filters lines, `sed` substitutes text, `tail` prints the end of a file."
},
{
"type": "cmd",
"text": "grep hello hello.txt"
},
{
"type": "warn",
"text": "`sed s/x/y/` substitutes the first match per LINE, not per file. `sed -i` overwrites the file immediately — checkpoint first (`checkpoint before-sed`). Pipes are partial in this build: `ls | grep x` may print the unfiltered listing; use `grep pattern file`."
},
{
"type": "text",
"text": "`tail -f` is interactive and stops with Ctrl+C. AI-initiated commands get a bounded read instead."
},
{
"type": "cmd",
"text": "tail hello.txt"
}
],
"exercise": {
"instruction": "Search a file for a word (create `hello.txt` with `edit` if needed).",
"accept": [
"grep hello hello.txt",
"grep * hello.txt",
"grep hello *"
],
"check": {
"type": "command"
},
"hint": "Type: grep hello hello.txt"
},
"quiz": {
"q": "`sed s/a/b/` replaces…",
"options": [
"every match in the file",
"the first match on each line",
"only the last line"
],
"answer": 1
},
"sources": [
"modules/core/module-fs.js",
"modules/ext/shell.js",
"modules/core/terminal.js"
]
}
]
}
|
