Caligula is a terminal user interface for writing disk images to removable media.
It helps you select the correct target device, works with compressed image files, and is designed to make the imaging process safer and more convenient from the command line.
This is free and open source software.
Key Features
- Shows attached disks along with their size and hardware model information.
- Supports compressed input images, including gzip, bzip2, xz, lz4, and zstd formats.
- Can validate the input image against a checksum before writing.
- Includes rich confirmation dialogs to help prevent accidental data loss.
- Verifies the disk after writing to confirm the image was written correctly.
- Can invoke sudo, doas, or su when elevated privileges are required.
- Displays graphs showing write speed during the imaging process.
Website: github.com/ifd3f/caligula
Support:
Developer: ifd3f
License: GNU General Public License v3.0

Caligula is written in Rust. Learn Rust with our recommended free books and free tutorials.
Related Software
| Flash OS Images | |
|---|---|
| Ventoy | Create bootable USB drive for ISO/WIM/IMG/VHD(x)/EFI files |
| USBWriter | Cross-platform disk image writer |
| Etcher | Image burner with multi-platform support |
| UNetbootin | Create bootable Live USB drives for Ubuntu and other distros |
| USB Imager | Lightweight cross-platform utility for writing and verifying disk images |
| Raspberry Pi Imager | Create bootable media. Not only useful for the Raspberry Pi |
| Imagewriter | Write RAW images and ISO images to USB keys |
| Fedora Media Writer | Creates bootable Fedora USB media and supports custom ISOs |
| Caligula | Terminal-based tool for flashing disk images to removable media |
| Impression | Create bootable drives |
| MultiBootUSB | Create multi boot live Linux on a removable USB disk |
| dd | Convert and copy files |
| GNOME Disks | View, modify and configure disks and media |
| MultiWriter | Write an ISO file to multiple USB devices at once |
| Mintstick | Tool for creating bootable USB media and formatting sticks |
| JustDD | USB image writer |
| KDE ISO Image Writer | Simple KDE utility for writing ISO files to USB drives |
| MajUSB | USB bootable drive creator with a GTK4 GUI |
Read our verdict in the software roundup.
| Alternatives to dd | |
|---|---|
| ddrescue | Data recovery tool |
| dcfldd | Enhanced version of dd |
| dd_rescue | Data recovery and data protection tool |
| ddi | Wrapper for dd |
| ddrescueview | GUI front-end for ddrescue |
Explore our carefully curated directory of recommended free and open source software, covering every major software category.The directory forms part of our extensive collection of articles for Linux enthusiasts. It includes hundreds of detailed reviews, together with free and open source alternatives to proprietary software from companies such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. LinuxLinks also covers interesting projects worth exploring, Linux-compatible hardware, free programming books and tutorials, and much more. Know a useful free and open source Linux application that we haven’t covered? Tell us about it using our submission form. |


Please read our Comment Policy before commenting.