SIRIL(1)

📦
version 1.4.4 · 11 versions
, in fedora 43, fedora 44

✨ SIRIL — the manual, but make it cute ✨

okay bestie, buckle up 💖 this is the manual page for siril from section 1 (that's General Commands Manual, for the uninitiated 🫶).

🌸 NAME 🌸

siril — image processing tool for astronomy and other applications. yes literally, it does other stuff too, she's versatile 💅

🦋 SYNOPSIS 🦋

siril [options] [file]
siril-cli [options] [file]

two binaries, one icon 👑

💜 DESCRIPTION 💜

Siril is a powerful image processing tool designed for improving the signal-to-noise ratio of astronomical images. no cap, that's her whole thing. 🌌

She comes with a wide range of tools for aligning, stacking, and enhancing images from various file formats, including image sequences. and the engine?? a high-precision 32-bit floating-point engine ✨ and she supports parallel processing so she runs fast. main character energy fr fr.

Now, the tea: the application is split into 2 binaries 🎀

  • siril — launches the program in graphic mode. the pretty one.
  • siril-cli — a command line interface allowing you to execute the following options. the mysterious one. iykyk.

💅 OPTIONS 💅

every single one, bestie, we're not skipping a thing 🙈

  • -v, --version — Prints the program name and version, then exits. one and done, periodt.
  • -i conf_file, --initfile=conf_file — Starts Siril with the specified configuration file. your custom setup, your rules ✨
  • -f, --format — Prints all supported input image formats, depending on the libraries detected at compile-time. so like, the list depends on how she was built 👀
  • -c, --copyright — Prints copyright information, then exits. legal girlie behavior 🎀
  • -h, --help — Displays a brief usage summary. the lil cheat sheet 🫶
  • -o, --offline — Starts siril in offline mode. No network functions will work in offline mode. After startup Siril may be put back into online mode using the built-in command online. so you can flip her back online later, no biggie 🌈
  • -p, --pipe — Starts Siril without the graphical user interface and uses named pipes to accept commands and print logs and status information. On POSIX systems, the named pipes are created in /tmp/siril_commands.in and /tmp/siril_commands.out. headless queen 💀
  • -r input_pipe_path, --inpipe=input_pipe_path — Provides an alternative path for the input pipe that receives the commands if -p is passed. The pipe can be created by an external program with the mkfifo(1) command. DIY pipes, slay 🔥
  • -w output_pipe_path, --outpipe=output_pipe_path — Provides an alternative path for the output pipe that prints logs and status updates if -p is passed. The pipe can be created by an external program with the mkfifo(1) command. same vibe, but outgoing 💖
  • -d working_directory, --directory=working_directory — Sets the specified path as the current working directory. she lives where you tell her to 🌸
  • -s script_file, --script=script_file — Starts Siril without the graphical user interface and runs the specified script instead. Scripts are text files that contain a list of commands to be executed sequentially. In these files, lines starting with a # are considered as comments. If this option is not passed, pipe operation is assumed as if -p had been passed. 📜✨
  • -s - — Redirects inputs written after - to stdin. little dash, big power 💅
  • file — Opens the specified image or sequence file immediately after startup. instant gratification, obsessed 😭

🎀 FILES 🎀

  • ~/.config/siril/config.1.4.ini — User preferences that can be overridden by the -i option. your settings, but make them changeable 🦋
  • /usr/share/siril/siril.css — The style sheet used to change the look of the graphical user interface. This is useful for customization or if a GTK theme is incompatible with some colored elements of Siril. glow-up enabled 👑
  1. Website with news, tutorials, FAQ, and more — https://siril.org
  2. Forum for Siril — https://discuss.pixls.us/siril
  3. Official documentation — https://siril.readthedocs.io/en
  4. Bug tracker — https://gitlab.com/free-astro/siril/-/issues
go say hi, the community is genuinely so sweet 🫶

👑 AUTHORS 👑

the legends themselves, respect on their names 💜

  • Vincent Hourdin <vh at free-astro dot org>
  • Cyril Richard <cyril at free-astro dot org>
  • Cécile Melis <cissou8 at gmail dot com>
  • Adrian Knagg-Baugh <aje dot baugh at gmail dot com>

Copyright © 2026 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.

This is free software: you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law. 😭 yeah, read that twice bestie — no warranty, fr fr.

and that's the whole page, you ate it 💅✨

sending you off with the receipts: this was siril 1.4.4, dated Feb 2025, from the SIRIL(1) manual. mwah, go stack some galaxies 🦋🌸💖

📦 where this page comes from