External Support Binaries

ENiGMA½ relies on various external binaries to perform common tasks such as processing file archives, extracting information from uploads/file imports, and supporting legacy transfer protocols.

Quick Check

On Linux, you can quickly check what is available in your PATH:

command -v exiftool xdms pdftotext 7za zip unzip lha unlzx arj unrar tar atr sexyz sz rz

If a command is missing, see the tables below.

Install (Linux)

These commands install the most common dependencies from OS packages. Some tools are uncommon on modern distributions and may require manual installation (see “Manual installs” below).

Debian/Ubuntu

sudo apt update
sudo apt install -y \
  arj \
  p7zip-full \
  zip unzip \
  lrzsz \
  poppler-utils \
  libimage-exiftool-perl \
  tar

Notes:

unrar is not always available in default Debian/Ubuntu repos (it may require enabling non-free / multiverse).
lhasa may provide an lha command on some distros.

RHEL / AlmaLinux / Rocky

sudo dnf install -y \
  arj \
  zip unzip \
  lrzsz \
  poppler-utils \
  perl-Image-ExifTool \
  tar

Notes:

p7zip / p7zip-plugins and unrar often require extra repositories (commonly EPEL and/or RPM Fusion), depending on distro/version.

Manual installs

The following are frequently not available in default repositories:

sexyz (SEXYZ X/Y/Zmodem): https://l33t.codes/outgoing/sexyz
xdms (Amiga DMS): http://zakalwe.fi/~shd/foss/xdms/ (see also Debian packaging: https://github.com/glaubitz/xdms-debian)
unlzx (Amiga LZX): http://xavprods.free.fr/lzx/
atr (Atari disk images): https://github.com/jhallen/atari-tools (provides an atr CLI that matches ENiGMA’s default Atr archiver commands)
lha: https://github.com/jca02266/lha (if you can’t get lhasa from packages)

Default executable mappings (what ENiGMA actually runs)

This section is a quick reference for the exact executable names ENiGMA runs by default. These defaults come from core/config_default.js, and can be overridden in your configuration.

Archives (`archives.archivers`)

Archiver key	Executable(s)	Notes
`7Zip`	`7za`	`p7zip` / `p7zip-full` generally provide `7za`
`InfoZip`	`zip`, `unzip`	Both must be in PATH
`Lha`	`lha`	Often provided by `lhasa` on Debian/Ubuntu; may require manual build on EL
`Lzx`	`unlzx`	`unlzx` is the extractor/list tool for Amiga `.lzx`
`Arj`	`arj`
`Rar`	`unrar`
`TarGz`	`tar`	Uses `tar` for list/extract
`Atr`	`atr`	Uses `atr` for list/extract of Atari `.atr` images

File transfer protocols (`fileTransferProtocols`)

Handler key	Executable(s)	Notes
`zmodem8kSexyz`	`sexyz`	SEXYZ implements `sz`/`rz` internally via args
`xmodemSexyz`	`sexyz`
`ymodemSexyz`	`sexyz`
`zmodem8kSz`	`sz`, `rz`	Provided by `lrzsz`

Information extractors (`infoExtractUtils`)

Extractor key	Executable(s)	Notes
`Exiftool2Desc`	(internal script)	Runs `util/exiftool2desc.js` (Node.js) which requires `exiftool` in PATH
`Exiftool`	`exiftool`	Used for long description extraction by default (including PDFs)
`XDMS2Desc`	`xdms`
`XDMS2LongDesc`	`xdms`

Archivers

Below is a table of pre-configured archivers. Remember that you can override settings or add new handlers! See Archivers.

Archiver (Key)	File Types	More Info	Debian/Ubuntu (apt/deb)	Red Hat (yum/rpm)	Windows
`Arj`	.arj	Wikipedia	`arj`	`arj`	ARJ
`7Zip`	.7z, .bzip2, .gzip/.gz, etc. Warning: Does not attempt to handle zip files! See `InfoZip`!	https://www.7-zip.org	`p7zip-full` (provides `7za`)	`p7zip` / `p7zip-plugins` (often via EPEL; provides `7za`)	7-zip
`InfoZip`	.zip	https://infozip.sourceforge.net `zip` and `unzip` must be in ENiGMA’s PATH	`zip` and `unzip`	`zip` and `unzip`	InfoZip
`Lha`	.lza, .lzh, etc.	Wikipedia https://fragglet.github.io/lhasa/	`lhasa` (provides `lha`)	Often not packaged on modern EL; build from source if needed	Win32 binaries
`Lzx`	.lzx	Amiga LZX	Often not packaged; build from source if needed	Often not packaged; build from source if needed	Source
`Rar`	.rar	Wikipedia	`unrar` (may require non-default repo)	`unrar` (may require non-default repo)	RARLAB
`TarGz`	.tar.gz, .gzip	Wikipedia	`tar`	`tar`	TAR.EXE
`Atr`	.atr	ATR (Atari 8-bit disk image) atari-tools	Not typically packaged; build from source	Not typically packaged; build from source	Varies

File Transfer Protocols

Handlers for legacy file transfer protocols such as Z-Modem and Y-Modem.

Handler (Key)	Protocol	More Info	Debian/Ubuntu (apt/deb)	Red Hat (yum/rpm)	Windows
`xmodemSexyz` `ymodemSexyz` `zmodem8kSexyz`	X-Modem, Y-Modem and Z-Modem (SEXYZ)	SEXYZ	Typically installed manually (standalone `sexyz` binary)	Typically installed manually (standalone `sexyz` binary)	Synchronet FTP
`zmodem8kSz`	Z-Modem 8K (`sz`/`rz`)	Wikipedia	`lrzsz` (provides `sz` and `rz`)	`lrzsz` (provides `sz` and `rz`)	Varies

Information Extractors

Information extraction utilities can extract information from various file types such as PDF in order to (attempt) to come up with a good default description.

Extractor	File Types	More Info	Debian/Ubuntu (apt/deb)	Red Hat (yum/rpm)	Windows
ExifTool	.mp3, .pdf, .mp4, .jpg, .gif, .png, many more	ExifTool	`libimage-exiftool-perl`	`perl-Image-ExifTool`	Varies
pdftotext	.pdf (text extraction)	poppler-utils	`poppler-utils`	`poppler-utils`	Varies
XDMS	Amiga DiskMasher images (.dms)	http://zakalwe.fi/~shd/foss/xdms/	`xdms`	Often not packaged on modern EL; build from source if needed	Varies

Notes

The exact command names ENiGMA executes are defined in core/config_default.js under archives.archivers, fileTransferProtocols, and infoExtractUtils.
Your config/config.hjson may override defaults (for example, using pdftotext instead of ExifTool for PDF long descriptions).