Ubuntu Server 25.10 will make Tmux the default terminal multiplexer, demote Byobu to Universe, and may replace wget with Curl post-26.04 LTS. Learn key changes, expert insights, and upgrade strategies for sysadmins.
What’s Changing in Ubuntu Server?
With less than a year until Ubuntu 26.04 LTS, Canonical’s engineers are refining Ubuntu Server 25.10 to ensure stability and performance ahead of the next long-term support release. Several key adjustments—including terminal multiplexer preferences, package demotions, and potential CLI tool replacements—are under evaluation.
This article explores:
Tmux replacing Screen as the default terminal multiplexer
Byobu’s demotion to Universe due to stalled development
Potential wget removal in favor of Curl post-26.04 LTS
Expert insights from Ubuntu Discourse discussions
1. Tmux to Become Ubuntu Server 25.10’s Default Terminal Multiplexer
Ubuntu Server has long included both Screen and Tmux for terminal session management. However, Ubuntu 25.10 will make Tmux the opinionated default, streamlining the user experience.
Why Tmux Over Screen?
Modern features: Better session persistence, split panes, and scripting support
Active development: Unlike Screen, Tmux receives frequent updates
Industry preference: DevOps and sysadmins increasingly favor Tmux
“Tmux aligns better with current sysadmin workflows,” explains Ubuntu engineer John Chittum in recent discussions.
2. Byobu Demoted to Universe: What It Means for Users
Byobu, a text-based window manager built atop Screen/Tmux, will be moved to Ubuntu Universe due to:
Stagnant upstream development (minimal updates in recent years)
Reduced relevance in modern server management workflows
Should You Still Use Byobu?
Existing users: Still installable from Universe, but no guaranteed security updates
New deployments: Consider native Tmux for better long-term support
3. Post-26.04 LTS: Will wget Be Replaced by Curl?
Post-Ubuntu 26.04 LTS, engineers are considering dropping wget as a default package, replacing it with Curl for CLI downloads.
Key Considerations:
✅ Curl’s dominance: Preferred in modern scripting (APIs, cloud automation)
⚠️ Backward compatibility: Many legacy scripts rely on wget
📅 Timeline: Earliest possible change in Ubuntu 26.10
“This won’t happen before 26.10 due to widespread wget dependency,” notes Chittum.
4. Additional Upcoming Ubuntu Server Changes
For a full breakdown, follow the official Ubuntu Discourse thread. Other potential adjustments include:
Network stack optimizations for cloud workloads
Minimal ISO refinements for faster deployments
Security hardening ahead of 26.04 LTS
Conclusion: Preparing for Ubuntu’s Next Evolution
Ubuntu Server 25.10 and 26.04 LTS will introduce key optimizations for sysadmins and DevOps teams. Key takeaways:
✔ Tmux is the new default multiplexer (bye, Screen!)
✔ Byobu moves to Universe—evaluate alternatives
✔ wget may disappear in 26.10—start migrating scripts to Curl
Stay updated via Ubuntu’s official channels.
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