Current Releases

Ubiquiti used to maintain a help article where the table below was kept up to date. Now you might able to to find the latest stable on Ubiquiti Unifi Download page or by browsing the Community Forum Releases. Beta releases on the forum require and account that has accepted the Early Access program.

Release Branch Definition Current Release
EOL Product Support Release that is maintained for products
that do not support newer firmware versions.
Stable General availability (GA) release.
Formerly called Stable
Beta Release we think can go to Stable unchanged.
Formerly called Stable Candidate & Release Candidate
Testing Feature-frozen, going to Release Candidate
and then Stable.
No longer used?
Unstable Branch where new features are being added. 6.1.26


UbiOS (Ubiquiti OS) Ubiquiti's new linux distribution which is expected to be gradually deployed in all their devices. Thensystem is based on Buildroot project and main elements are written in C++.

Technologies used: Buildroot, C, C++, various linux tools and daemons

Internal Disk Layout
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt

Device       Start      End  Sectors  Size Type
/dev/sdb1     2048   133119   131072   64M Linux filesystem
/dev/sdb2   133120  2230271  2097152    1G Linux filesystem
/dev/sdb3  2230272  4327423  2097152    1G Linux filesystem
/dev/sdb4  4327424  4589567   262144  128M Linux filesystem
/dev/sdb5  4589568  4655103    65536   32M Linux filesystem
/dev/sdb6  4655104 30777310 26122207 12.5G Linux filesystem
FS details
Partition Mount point
/dev/sdb3 root
/dev/sdb4 /mnt/persistent
/dev/sdb6 /mnt/data

Swap is in a ~7G zram disk. Memory limit is set to around ~3G

Boot Sequence

Built upon Alpine v2 but using BusyBox for init


Init process via BusyBox

  • init process reads ⁄etc⁄inittab for sysinit entires
  • init calls ⁄etc⁄init.d⁄rcS
  • rcS executes Start scripts in ⁄etc⁄init.d in order
Startup Scripts
File Name Description
S95unifi-os Starts Unifi OS Container

UniFi OS - a shared platform for all UniFi controllers and to manage users.

UniFi OS is a web portal to provide consistent experience across UniFi products. The actual implementation in UbiOS can vary

Introducing Unifi OS

Key Features

  • Centralized user/access management
  • Single sign-on to all controllers
  • Single Remote connection and new Cloud portal
  • Easy installation and management of different Apps (Controllers)

Available Apps (Controllers)

  • Network (pre-installed)
  • Protect (requires HDD)
  • Talk
  • Access

Software Information

  • products/software.txt
  • Last modified: 2020/12/01 12:35
  • by riy-en