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Abdessamad Derraz 8361575be8 docs: start pages say what the installer does

The safety list names the save folder, every install command shows its Windows form, first install reads the last line of a run, the FAQ answers zip or unzip and the arcade version rule, and each page keeps one name.

2026-10-23 02:42:19 +02:00

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level, order

level	order
start	30

First install, step by step

From an empty BIOS folder to games that start.

You need: internet and some free space. The installer says how much.

1. Open a terminal and paste

A terminal is a window where you type commands. Paste the line for your system, then press Enter.

Open the Start menu. Type PowerShell and open it.

irm https://raw.githubusercontent.com/Abdess/retrobios/main/install.ps1 | iex

Open Terminal. It is in Applications, then Utilities.

curl -fsSL https://raw.githubusercontent.com/Abdess/retrobios/main/install.sh | sh

Open a terminal.

curl -fsSL https://raw.githubusercontent.com/Abdess/retrobios/main/install.sh | sh

Switch to Desktop Mode and open Konsole.

curl -fsSL https://raw.githubusercontent.com/Abdess/retrobios/main/install.sh | sh

Install Termux, a terminal app. Run these three lines in it.

pkg install python
termux-setup-storage
curl -fsSL https://raw.githubusercontent.com/Abdess/retrobios/main/install.sh | sh

On Batocera, Recalbox and similar setups, follow your setup's page.

2. Check the folder it found

It shows your setup and its BIOS folder:

  Found <your setup> at <its folder>

Right folder? Go on.
Wrong folder? Press Ctrl+C. Run the command again with --dest and your folder.

3. Choose what to install

  Enter) install everything
  i) only what the installed cores read
  c) choose systems, cores and regions
  q) quit

Enter installs everything. c lets you pick consoles.

4. Wait

You can stop with Ctrl+C at any time. Run the command again to carry on.

5. Read the last line

Done. All files are in place.
Finished with errors. Some files failed. Run the same command again. It retries only those.
Nothing was installed. The lines above it say why. See If it stops.

What the command does

Check it later

Add --check to the same command. It changes nothing.

curl -fsSL https://raw.githubusercontent.com/Abdess/retrobios/main/install.sh | sh -s -- --check

All good when you see 0 wrong hash.

Undo

It keeps every file it replaces in a retrobios-backup folder, next to your BIOS folder. The end of the run prints the line that puts them back.

If it stops

No supported platform detected.

At a terminal, a menu follows. Pick your setup by its number, then type its BIOS folder.

With --no-input, or without a terminal, it stops and prints the command to use.

Error: Python 3.8 or newer is required.

The message shows the command that installs Python. Run it, then run the installer again.

A RetroPie 4.8 image has Python 3.7.3, and its update command finds nothing newer. Use the RetroPie ZIP there, unzipped into ~/RetroPie/BIOS/.

Error: the downloaded installer does not match its expected fingerprint.

The download was cut short. Nothing was changed. Run the command again.

Cannot create ...

You do not have the right to write there. Do what the message says. It names what to run.

Not enough space on the drive holding ...

It stopped before writing. Free some space, or use --dest to pick another drive.

The game still does not start

See When a game does not start.

Next steps

Your setup's page: its folder and how it checks files
When a game does not start
Details: Reading the installer's output, line by line

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