Mirror Fetch

aptui can automatically detect your Linux distribution, test available mirrors for latency, and apply the fastest ones to your APT sources.

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Opening the mirror view

Press f on the main screen. APTUI will:

1. Detect your distribution from /etc/os-release
2. Fetch a list of available mirrors
3. Test each mirror's latency concurrently
4. Display results sorted by speed, with scores

Controls

Key	Action
f	Open mirror fetch view
space	Toggle mirror selection
enter	Apply selected mirrors
esc	Cancel / close mirror view
↑ / k	Move selection up
↓ / j	Move selection down
pgup / ctrl+u	Page up
pgdown / ctrl+d	Page down

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How it works

Mirror discovery

Distro family	Source
Ubuntu-based (Ubuntu, Pop!_OS, Linux Mint, elementary, Zorin, KDE neon)	Launchpad RSS feed
Debian-based (Debian, Kali, MX Linux, antiX, Devuan)	debian.org mirror list

Up to 50 mirrors are sampled from the full list for testing.

Latency testing

• All mirrors are tested concurrently (up to 25 at a time)
• Each mirror is tested with an HTTP HEAD request to {url}/dists/
• Timeout: 3 seconds per mirror
• Mirrors that fail or time out are excluded from results

Scoring

Mirrors are scored from 100 (fastest) downward based on relative latency. The top 3 fastest mirrors are automatically pre-selected.

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Applying mirrors

After selecting mirrors with space, press enter to apply. APTUI writes the selected mirrors to:

/etc/apt/sources.list.d/aptui-mirrors.list

On Termux, the file is written to $PREFIX/etc/apt/sources.list.d/aptui-mirrors.list instead.

The file includes entries for:

• Main repository
• Updates
• Security components

After writing, APTUI runs apt-get update to refresh the package indexes.

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Supported distributions

Ubuntu-based

• Ubuntu
• Pop!_OS
• Linux Mint
• elementary OS
• Zorin OS
• KDE neon

Debian-based

• Debian
• Kali Linux
• MX Linux
• antiX
• Devuan