head to head · open source
calibre vs 101-linux-commands
calibre has 25,927 GitHub stars, 2,693 forks, 6 open issues and last shipped today. 101-linux-commands has 1,130 stars, 141 forks, 3 open issues and last shipped 6 months ago. calibre leads on adoption by 2,194% (25,927 vs 1,130 stars). calibre is written in Python under GPL-3.0; 101-linux-commands is written in HTML under MIT. calibre has attracted 10% as many forks as stars, 101-linux-commands 12%. calibre was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ebook), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| calibre | 101-linux-commands | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 1.1K |
| License | GPL-3.0 | MIT |
| Written in | Python | HTML |
| Last push | 2026-09-18 | 2026-03-24 |
| Forks | ⑂ 2.7K | ⑂ 141 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick calibre if
- You weight community size — 26K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick 101-linux-commands if
- You want the 101-linux-commands feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches HTML
- You evaluated both and 101-linux-commands fits your workflow better
About calibre
calibre is the official source code repository for the calibre e book manager, an open source application written in Python and released under GPL 3.0. It lives in the content and publishing ecosystem as a desktop tool for books, and it is cross platform, running on Linux, Windows and macOS. The project has been hosted on GitHub for roughly thirteen years, carries about 25,900 stars and 2,683 forks, and its home on the web is calibre ebook.com, where an About page and a screenshots page document it further.
read the full calibre overview →
About 101-linux-commands
101 Linux commands is an open source, MIT licensed eBook that teaches the 101 Linux commands everyone should know, written for DevOps and SysOps engineers, developers, and Linux enthusiasts who will have to use the terminal at some point in their careers.
read the full 101-linux-commands overview →
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Frequently asked questions
Is calibre or 101-linux-commands more popular?
calibre has 25,927 GitHub stars and 101-linux-commands has 1,130. calibre has the larger community by that measure.
Are calibre and 101-linux-commands free?
Both are open source. calibre is licensed under GPL-3.0 and 101-linux-commands under MIT. Neither carries a licence fee.
What is the difference between calibre and 101-linux-commands?
calibre is written in Python and 101-linux-commands in HTML. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, calibre or 101-linux-commands?
Choose calibre if you want the larger community (25,927 stars) or its GPL-3.0 licence terms. Choose 101-linux-commands if its feature set, stack or MIT licence fits better. Both are self-hostable.