Try APT or Homebrew for clean demos; curl | bash shows shell-installer output.
Scenario change queued. It will apply on the next Start or Reset.
Accepted styles: Auto, macOS, Windows, or Linux.
Windowed stays embedded; Fullscreen or Popup is better for capture.
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Use 1.00x for normal demos; 0.50x slows walkthroughs, 2.00x speeds loops.
Stable is smooth; throttled or flaky profiles make retries easier to see.
Turn off for clean success streams; turn on with flaky or throttled profiles.
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Turn off before scrolling back; exports still use retained history.
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Keep 80-600 lines; raise before recording long loops.
lines
Use 3-6 for short clips; 9-18 for busier terminal loops.
packages
Enter up to 10 digits; leave blank for a new random sequence on reset.
Enable when screenshots or demos need line-by-line timing context.
{{ timestamps ? 'On' : 'Off' }}
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[{{ line.time }}] {{ line.prompt }} {{ line.text }}
[{{ clockNow }}] {{ scenarioPreset.prompt }} {{ livePromptText }}
Waiting to start... click Start to stream the fake install.
Tags: Devops, Shell
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Advanced
:

Terminal installer output is more than visual noise. During a real package install, each line tells the reader whether the command is still resolving dependencies, fetching archives, verifying downloaded content, running install hooks, writing configuration, or cleaning up. That stream is useful in training material because it teaches people how to recognize normal movement, slow mirrors, retry language, and final success without changing a real workstation.

Different installer families use different words for similar work. APT output talks about package lists, archives, dependency trees, and triggers. DNF and Pacman describe transactions, repositories, and synchronization. Homebrew adds formulae, bottles, caveats, and linked commands. WinGet and Chocolatey fit Windows application install flows, where installer identity, silent mode, validation, elevation, and PATH changes often matter. npm, pip, and Cargo bring registry, wheel, crate, dependency graph, and build vocabulary into the same general pattern.

Progress language
Shows whether the session is planning, downloading, installing, configuring, or finishing.
Warning language
Marks a retry, timeout, checksum note, lock wait, or other condition that needs explanation before a viewer treats it as failure.
Trust boundary
A rehearsal log can teach vocabulary and timing, but only output from the real host can prove a real install result.
Terminal installer flow from command prompt through prepare, download, install, configure, and finish stages.

Good demonstration output needs recognizable detail. Prompt style, package names, host names, transfer sizes, stage order, and retry wording all help the audience understand what kind of installer they are watching. A fake-looking block of success lines may be tidy, but it does not teach where long waits, warning colors, or post-install notes usually appear.

Synthetic installer output still has a firm boundary. It can illustrate the shape of a package-manager session and help a narrator explain common messages. It cannot prove that a repository is healthy, a mirror is reachable, a checksum is valid, a shell script is safe, an installer has permission to write to disk, or a real host would finish at the same speed.

How to Use This Tool:

Start by choosing the installer story you need, then tune the stream for the recording, lesson, or support note you are preparing.

  1. Pick a Scenario that matches the audience. APT, DNF, and Pacman fit Linux package-manager lessons, Homebrew fits macOS command-line demos, WinGet and Chocolatey fit Windows installation examples, npm global, pip install, and Cargo fit developer package workflows, and Shell installer fits bootstrap-script demonstrations.
  2. Set Window style before capture. Auto follows the browser's platform hint, while macOS, Windows, and Linux styles let the terminal chrome match the system shown in the rest of your material.
  3. Choose Display mode. Windowed keeps the simulator inside the page, Fullscreen gives a cleaner capture surface, and Popup window separates the terminal for screen recording.
  4. Use Network profile and Warnings & jitter together. Stable datacenter keeps the run calm, Home Wi-Fi adds normal variation, Throttled VPN slows the stream, and Unstable hotspot makes stalls, retry language, and warning lines more visible.
  5. Adjust Line pace, Packages per loop, Max log lines, Auto-scroll, and Timestamp display for the length of the clip. Raise the retained-line limit before a long recording if the beginning of the session needs to appear in the ledgers or exports.
  6. Enter a Random seed when repeatability matters. The same seed and settings recreate the same package order, host choices, timing variation, and warning placement after reset. Use Auto or Random when a fresh run is more useful.
  7. Press Start, pause at the point you want to discuss, then compare Terminal Replay, Session Metrics, Package Ledger, Event Ledger, Progress Trace, and JSON before copying or downloading the result.

If the session looks too busy, reduce Packages per loop to 3 to 6, turn warnings off, and keep Line pace near 1.00x. If the stream feels too clean for troubleshooting training, enable warnings and move the Network profile toward Throttled VPN or Unstable hotspot.

Interpreting Results:

Terminal Replay is the presentation view. Use it to confirm that the prompt, command, terminal style, timestamps, warning color, and scrolling behavior look right for a screenshot or video. Session Metrics summarizes the current state, selected scenario, loop progress, network profile, retries, warning count, downloaded payload, replay seed, and session uptime.

  • Loop progress shows where the current generated package queue stands. It is a simulator percentage, not an estimate from APT, Homebrew, WinGet, npm, pip, Cargo, or any other real manager.
  • Average speed, Latency, and Downloaded payload come from the selected synthetic network profile and generated package sizes.
  • Retries and warnings count injected warning or error-style lines. They are useful for narration, but they do not diagnose a real mirror, registry, certificate, proxy, or installer failure.
  • Package Ledger is the best place to check package names, versions, hosts, sizes, transfer progress, stage, and active or queued state.
  • Event Ledger is the exact retained event sequence. Use it when the order of lines matters more than the terminal preview.
  • Progress Trace shows how the generated loop moved from early setup to completion, with warning and error markers where they occurred.

For repeat recordings, verify the Replay seed and selected Scenario before each take. For real troubleshooting, compare the synthetic wording with output captured from the affected host instead of treating the generated warnings as evidence.

Technical Details:

A package-install session is easier to model when it is treated as staged work. Most command-line installers begin with setup or dependency resolution, move into downloads or source retrieval, perform install or build steps, run configuration hooks, and then print cleanup or success lines. The exact words differ by package manager, but the broad order is stable enough for a believable simulator.

The generated session uses a queue of package-like work items. Each item carries a package name, version, host, size, downloaded amount, stage progress, and final state. The chosen scenario supplies the command, prompt, package pool, host pool, and message families. The network profile supplies delay, jitter, throughput, latency, and warning tendency. A numeric seed makes the random choices repeatable.

Formula Core:

Loop progress is computed from the count of completed packages plus the active package's own progress through its stages.

loop progress = 100 × completed packages + active package progress 100 total packages in loop

For example, if a loop has 8 packages, 3 are complete, and the active package is 50% done, the displayed loop progress is 100 * (3 + 0.50) / 8, or about 44% after rounding for display.

Rule Core:

  1. Build the package queue from the selected scenario and Packages per loop value, keeping the demonstration package in the generated set.
  2. Type the scenario command into the terminal view, then emit prelude lines that match the package-manager family.
  3. Move each package through Prepare, Download, Install, Configure, and Finish until it completes or the generated loop restarts.
  4. Sample speed and latency from the active network profile for transfer lines, delay timing, average-speed metrics, and chart points.
  5. Inject warning or error-style lines only when Warnings & jitter is enabled, with higher odds for slower or unstable profiles.
  6. Trim retained history to the Max log lines value, then derive the replay, metrics, ledgers, progress trace, and JSON from that retained history.
Stage Package progress band Typical installer meaning
Prepare 0% to < 12% Package lists, dependency checks, package selection, registry setup, or transaction planning.
Download 12% to < 38% Repository, mirror, registry, bottle, wheel, crate, archive, or installer payload retrieval.
Install 38% to < 68% Unpacking, pouring, compiling, verifying, linking, or placing installed files.
Configure 68% to < 96% Triggers, scriptlets, environment notes, PATH messages, caveats, or post-install hooks.
Finish 96% to 100% Cleanup, verification, summary output, and loop completion.
Network profile Base delay Speed range Latency range Best use
Stable datacenter 420 ms 18 to 92 MB/s 18 to 95 ms Clean demonstrations with few stalls.
Home Wi-Fi 560 ms 7 to 42 MB/s 45 to 190 ms Everyday variation without heavy failure language.
Throttled VPN 780 ms 2.2 to 16.5 MB/s 120 to 420 ms Slower walkthroughs with visible waits.
Unstable hotspot 920 ms 0.8 to 9.8 MB/s 220 to 980 ms Retry and warning demonstrations.
Mechanism What it affects Important limit
Random seed Package order, versions, host choices, timing samples, and warning placement. The same seed only repeats the generated session for the same settings.
Line pace How quickly generated lines appear in the terminal stream. It changes playback timing, not real network or installer speed.
Retained history The terminal, ledgers, progress chart, JSON, copied rows, and downloaded artifacts. Older lines are dropped after the selected Max log lines value is exceeded.

Advanced Tips:

  • Use Random seed for repeatable screenshots, then keep Scenario, Network profile, Packages per loop, Line pace, and Warnings & jitter unchanged between takes.
  • Set Max log lines near 600 before long recordings so the Event Ledger, Progress Trace, JSON, CSV, and DOCX output keep the beginning of the session.
  • Pair Throttled VPN or Unstable hotspot with warnings only when the lesson needs retry or timeout language; use Stable datacenter for clean product demos.
  • Choose Popup window or Fullscreen before screen capture so resizing does not change the visible terminal area during a take.
  • Keep Timestamp display on for classroom walkthroughs where line order matters, and turn it off for clean marketing screenshots.
  • Use Progress Trace to confirm the generated story has enough stage movement before exporting a replay for documentation.

Limitations and Privacy:

The simulator generates terminal text in the browser for demonstration use. It does not run package-manager commands, inspect installed software, install dependencies, open a shell, or contact real package repositories. The warning and error-style lines are controlled by the selected settings and should not be treated as a real diagnosis.

  • Generated package names, versions, sizes, speeds, and hosts are presentation data.
  • Popup and fullscreen modes change the viewing surface only; they do not change the generated session.
  • After the page assets load, session data remains in the browser unless you copy it, download it, or paste it elsewhere.
  • For operational troubleshooting, capture the actual command output from the affected host and compare it with the relevant package-manager documentation.

Worked Examples:

Repeatable Homebrew recording:

A product walkthrough needs the same macOS terminal sequence across two takes. Choose Homebrew (macOS), set Packages per loop to 5, keep Warnings & jitter off, and enter a seed such as 424242. Session Metrics should show the Homebrew scenario, a Replay seed value, calm retry counts, and the current loop progress. If the second take differs, check that Scenario, Network profile, Packages per loop, and Random seed still match.

Noisy shell-installer lesson:

A security awareness slide needs to show why remote bootstrap scripts deserve caution. Choose Shell installer (curl | bash), set Network profile to Unstable hotspot, and enable Warnings & jitter. The Event Ledger will include generated verification, retry, slow-transfer, or checksum-style messages. Use those lines to explain the vocabulary, then remind viewers that real trust decisions require inspecting the script source and the actual installer output.

Short classroom screenshot:

A Linux class needs a compact example that fits one slide. Choose APT (Linux), set Packages per loop to 3, enable Timestamp display, press Start, and pause during the second package. Terminal Replay gives the visual screenshot, while Package Ledger confirms which package is active, queued, or done.

FAQ:

Does it install anything?

No. It generates text and metrics for a simulated session. It does not run shell commands, change the local system, install packages, or query a real package database.

Why does a seed matter?

A seed makes the same scenario and settings replay the same generated choices after reset, which helps when narration, screenshots, or exported ledgers need to match.

Why did earlier lines disappear from an export?

The Max log lines setting limits retained history. Increase it before a long run if the beginning of the session must appear in Terminal Replay, Event Ledger, JSON, CSV, or DOCX output.

Can warning lines prove a real network or installer failure?

No. Warnings are synthetic cues controlled by Warnings & jitter and the Network profile. Diagnose real problems with actual command output from the machine involved.

Which view should I check before sharing a demo?

Use Terminal Replay for the visual story, Session Metrics for high-level state, Package Ledger for package details, and Event Ledger when exact line order matters.

Glossary:

Scenario
The selected package-manager family that shapes the prompt, command, package pool, host names, and message style.
Package queue
The generated set of packages processed during one loop.
Network profile
A preset for synthetic delay, speed, latency, stalls, and warning likelihood.
Replay seed
A numeric value that makes generated choices repeatable for the same settings.
Retained history
The recent event lines kept for replay, ledgers, chart points, JSON, and downloadable artifacts.
Progress trace
The charted sequence of retained events and loop progress percentages.

References: