Unifi OS - Software Information

Unifi OS isn't really an "OS" from a technical perspective. It will look different on different devices, but the end user experience will be the same. It's better to view the Unif OS was the Web UI that manages the devices and controllers running.

The first target device is UDM-Pro and it will be launched for general availability with UniFi OS pre-installed.

  • Local portal available here: https://unifi/
  • Remote access available here:
  • SSH is disabled by default after setup and could be enabled in advanced settings.
  • Mobile apps are still in development (iOS version available on Testflight, Android via Google Play Store BETA)

UDM Pro has a base os install that appears to be a customized Alpine distribution.

This base os leverages podman to run a Debian container that runs all the controller and backend services required for each.

  • Network (pre-installed)
  • Protect (requires HDD)
  • LED
  • Talk
  • Accesss

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
  • products/software/unifi-os/software_information.txt
  • Last modified: 2020/03/04 16:13
  • by riy-en