Abandoning Scientific Linux Was a Mistake
CERN's recent decision to deploy Debian 13 on over 2,200 industrial computers has prompted a retrospective on the earlier abandonment of Scientific Linux. The author argues that dropping Scientific Linux in favor of CentOS was a strategic error because it eliminated a critical institutional backup for the high-energy physics community. While the move to CentOS seemed cost-effective at the time, it removed the option value of maintaining an independent, RHEL-compatible distribution that could serve as a credible exit strategy.
- ▪CERN plans to run Debian 13 on more than 2,200 industrial computers and embedded systems within its accelerator complex by the end of 2026.
- ▪Scientific Linux was originally created by Fermilab and CERN to provide a stable, freely redistributable, and institutionally independent Linux distribution for high-energy physics experiments.
- ▪Fermilab decided in 2019 not to release Scientific Linux 8, opting instead to deploy CentOS 8 and collaborate with other laboratories to improve CentOS for scientific use.
- ▪The author contends that maintaining Scientific Linux provided essential option value by preserving the infrastructure and expertise needed to maintain an independent RHEL-compatible platform.
- ▪AlmaLinux and RHEL remain the primary supported Linux distributions across much of CERN, with Debian support currently limited to accelerator front-end systems.
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| Original publisher | Melashri |
| Canonical URL | https://blog.melashri.net/posts/scientific-linux-mistake/ |
| Publication time | Wed, 23 Sep 2026 08:46:39 +0000 |
| Retrieval time | 2026-09-23T09:19:30.689Z |
| Last seen | 2026-09-23T09:19:30.689Z |
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| Cluster | RiymodhT5k2J · 1 stories |
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Abandoning Scientific Linux Was a Mistake 02 Sep 2026 11 min read A recent CERN announcement caught my attention. By the end of 2026, more than 2,200 industrial computers and embedded systems around CERN's accelerator complex are expected to be running Debian 13. CERN is not abandoning the Red Hat ecosystem. AlmaLinux and RHEL remain the main supported Linux distributions across much of the organization; Debian support is currently limited to accelerator front-end systems. Still, the move took me back to a decision made more than a decade ago: CERN and Fermilab's gradual abandonment of Scientific Linux. With hindsight, I think it was a mistake. Not because Scientific Linux was technically superior to CentOS, or because maintaining another Linux distribution was free.
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