Change UniFi Camera Password from Command Line

Basic steps are

  • Change password with passwd
  • Copy passwd hash to /tmp/system.cfg
  • Apply Changes

Changing Password with passwd

The passwd command is normally used for changing the password for a Linux user. We’ll use it to change our user password and then copy the hash out of the /etc/passwd file to use in the Ubiquiti config file.

UVC.v4.18.37.67# passwd
Changing password for admin
New password:
Retype password:
passwd: password for admin changed by admin

Copy passwd hash to /tmp/system.cfg

Using “cat /etc/passwd”, we can get what the new password hash is and can copy that into the /tmp/system.cfg file.

UVC.v4.18.37.67# cat /etc/passwd

Open up the /tmp/system.cfg config file, find the section below and replace the hash part, i.e. the part that is in bold.

As a side note, you can copy and past all of the “users.1.*” lines and change the 1 to 2 and have a second user.

Apply Changes

You can use the following command to write the changes and then reboot the camera.

cfgmtd -f /tmp/system.cfg -w && reboot

Long Example

[admin@localhost ~]$ ssh ubnt@
ubnt@'s password:
BusyBox v1.29.2 () built-in shell (ash)
UVC.v4.18.37.67# passwd
Changing password for admin
New password:
Retype password:
passwd: password for admin changed by admin
UVC.v4.18.37.67# cat /etc/passwd
UVC.v4.18.37.67# vi /tmp/system.cfg <- Edit the text file and replace the hash with the one from above
UVC.v4.18.37.67# cfgmtd -f /tmp/system.cfg -w && reboot

Upgrade AirFiber 11 to 4.1 from SSH

Quick list of commands

ssh ubnt@  <- Replace with username and IP address
cd /tmp
mv AF11.v4.1.0.bin fwupdate.bin
/sbin/fwupdate -m
  1. Upload the firmware using FTP or SCP to the /tmp directory
  2. Rename the file from AF11…bin to fwupdate.bin
  3. Start the upgrade with
/sbin/fwupdate -m

Wait for it to finish upgrading

UNMS is starting… Repairing UNMS

UNMS is starting

Checking log files.

Log files are located in /home/unms/data/logs

larry@localhost:~$ sudo tail -f /home/unms/data/logs/unms.b5a3713b02f71e06fb3a84a3a9a75c558.log
{"msg":"setting permissions on /home/app/unms/data/control","name":"unknown","hostname":"unknown","pid":0,"v":0,"level":30,"tag":"unms","time":"2020-04-17T16:28:35+00:00"}
{"msg":"Linking /home/app/unms/public/site-images -> /home/app/unms/data/images","name":"unknown","hostname":"unknown","pid":0,"v":0,"level":30,"tag":"unms","time":"2020-04-17T16:28:35+00:00"}
{"msg":"Linking /home/app/unms/public/firmwares -> /home/app/unms/data/firmwares","name":"unknown","hostname":"unknown","pid":0,"v":0,"level":30,"tag":"unms","time":"2020-04-17T16:28:35+00:00"}
{"msg":"Stepping down from root: su-exec \"/usr/local/bin/\" \"index.js\"","name":"unknown","hostname":"unknown","pid":0,"v":0,"level":30,"tag":"unms","time":"2020-04-17T16:28:35+00:00"}
{"msg":"Running docker-entrypoint index.js","name":"unknown","hostname":"unknown","pid":0,"v":0,"level":30,"tag":"unms","time":"2020-04-17T16:28:35+00:00"}
{"msg":"Version: 1.1.6+e6ec4747d.2020-03-13T10:52:14+01:00","name":"unknown","hostname":"unknown","pid":0,"v":0,"level":30,"tag":"unms","time":"2020-04-17T16:28:35+00:00"}
{"msg":"Waiting for database containers","name":"unknown","hostname":"unknown","pid":0,"v":0,"level":30,"tag":"unms","time":"2020-04-17T16:28:35+00:00"}
{"msg":"psql: fe_sendauth: no password supplied","name":"unknown","hostname":"unknown","pid":0,"v":0,"level":30,"tag":"unms","time":"2020-04-17T16:28:35+00:00"}
{"msg":"nc: bad address 'unms-redis'","name":"unknown","hostname":"unknown","pid":0,"v":0,"level":30,"tag":"unms","time":"2020-04-17T16:28:35+00:00"}


sudo ~unms/app/unms-cli stop

Start UNMS

sudo ~unms/app/unms-cli start

Fix Redis AOF

sudo ~unms/app/unms-cli fix-redis-aof

Running the above command resolved the problem and let UNMS start working.

larry@localhost:~$ sudo ~unms/app/unms-cli stop
larry@localhost:~$ sudo ~unms/app/unms-cli fix-redis-aof
Creating network "unms_internal" with the default driver
Creating network "unms_public" with the default driver
Creating unms-fluentd
The AOF appears to start with an RDB preamble.
Checking the RDB preamble to start:
[offset 0] Checking RDB file --fix
[offset 26] AUX FIELD redis-ver = '5.0.5'
[offset 40] AUX FIELD redis-bits = '64'
[offset 52] AUX FIELD ctime = '1587130996'
[offset 67] AUX FIELD used-mem = '276217328'
[offset 83] AUX FIELD aof-preamble = '1'
[offset 85] Selecting DB ID 0
[offset 80304063] Checksum OK
[offset 80304063] \o/ RDB looks OK! \o/
[info] 3307 keys read
[info] 0 expires
[info] 0 already expired
RDB preamble is OK, proceeding with AOF tail…
0x 79b7264: Expected prefix '*', got: '
AOF analyzed: size=127631360, ok_up_to=127627876, diff=3484
This will shrink the AOF from 127631360 bytes, with 3484 bytes, to 127627876 bytes
Continue? [y/N]: Successfully truncated AOF
larry@localhost:~$ sudo ~unms/app/unms-cli start

On the forums they seemed to recommend stopping the service and running

sudo ~unms/app/unms-cli rewrite-redis-aof

I was getting the following error when trying to run this command. Running the above command worked though.

larry@localhost:~$ sudo ~unms/app/unms-cli stop
larry@localhost:~$ sudo redis-check-aof --fix ~unms/data/redis/appendonly.aof
The AOF appears to start with an RDB preamble.
Checking the RDB preamble to start:
[offset 0] Checking RDB file --fix
[offset 9] Can't handle RDB format version 9
[additional info] While doing: start
[additional info] Reading type 0 (string)
[info] 0 keys read
[info] 0 expires
[info] 0 already expired
RDB preamble of AOF file is not sane, aborting.

MongoDB – dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)

Ran into an issue when trying to figure out some problems with UniFi and UniFi-Video. Upgrading both to the latest version was causing problems, because they both needed different versions of MongoDB.

Was getting the following error when trying to install MongoDB. Think I was trying to install Mongo following the instructions on their site and then it caused issues with apt.

dpkg: error processing archive /var/cache/apt/archives/mongodb-org-server_4.2.5_amd64.deb (--unpack):
trying to overwrite '/usr/bin/mongod', which is also in package mongodb-server-core 1:3.6.3-0ubuntu1.1
dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)

Removed the following file

rm /etc/apt/sources.list.d/mongodb-org-4.2.list

and was able to use apt again to install MongoDB. Didn’t end up solving my problem because I technically needed two versions, but at least apt was being nice again. Ended up installing the UniFi controller docker container and can run both on the same server that way.

Installing UniFi controller in Docker Container

Instructions followed from here. Some changes were made
Commands work on Ubuntu 16.04

Install Docker

sudo apt install -y docker
systemctl enable docker
systemctl start docker

Install UniFi

sudo docker pull jacobalberty/unifi:latest

Setup Docker Image

The following command sets up a container which we can later manipulate to start and stop the “service”
You can specify where you want the UniFi files to reside if desired.

sudo docker run -d --init --restart=unless-stopped --name=unifi-controller --net=host --volume=/docker/unifi:/var/lib/unifi -p 8080:8080/tcp -p 8081:8081/tcp -p 8443:8443/tcp -p 8843:8843/tcp -p 8880:8880/tcp -p 8883:8883/tcp -p 3478:3478/udp jacobalberty/unifi:latest

Docker commands

List docker containers

sudo docker container list
367c7a1465ec        jacobalberty/unifi:latest   "/usr/loca/bin/dock…" 15 minutes ago      Up 14 minutes (healthy) unifi-controller

List docker images on system

sudo docker images
jacobalberty/unifi latest baebbe301633 9 days ago 711MB

Stop container. Also stops the UniFi service. Change the ID to your container ID.

sudo docker stop 367c7a1465ec

Other notes

When setting up the Docker image, the directory specified was “/docker/unifi” so all the UniFi files are in there and it looks like if you manipulate the files, it makes the changes fine. At least for setting up the SSL certificates.

Change Static IP on AirFiber over SSH

Log into device

SSH into AirFiber

ssh ubnt@

Modify config file

Open up the “/tmp/system.cfg” configuration file

vi /tmp/system.cfg

Find the line that has the ip address and modify the address.
Note that you’ll need to hit i to enter text if you are using vi

netconf.3.ip=   <-- Change IP here

Save file by hitting the esc key then type :x and then hit Enter

Save changes and reboot

Now run the following command to write the changes to the device. Once it comes back up it should have the new IP address from the config file.

cfgmtd -f /tmp/system.cfg -w && reboot

Mikrotik RouterOS – VLAN notes

VLAN successfully passes through regular Ethernet bridges

DHCP offering lease without success issue with Mikrotik on the far side of Ubiquiti device.

DHCP error offering lease

Make sure that radio does not have the VLAN configured on just the WAN interface. Easiest way would be to put it in bridge mode and use the management VLAN.

no matching cipher found. Their offer: aes128-cbc,3des-cbc…

When trying to SSH to older devices like a Ubiquiti Bullet2, you may receive an error saying.

no matching cipher found. Their offer: aes128-cbc,3des-cbc,aes256-cbc,twofish256-cbc,twofish-cbc,twofish128-cbc,blowfish-cbc

Work around it to manually specify the cipher with the “-c” option. You will also probably need to specify the KexAlgorithm

ssh -c aes128-cbc -oKexAlgorithms=+diffie-hellman-group1-sha1 admin@

You can see what ciphers ssh supports by running “ssh -Q cipher”

Example output

ssh -Q cipher

More information

UNMS – Set user as Super Admin from command line

The following commands can be run from a ssh session to your UNMS instance.

Show Current Users

sudo ~unms/app/unms-cli set-superadmin

Should get something like the following

            UNMS Users
 │ (index) │ username  │           email           │     role     │ two-factor │
 │    0    │  'larry'  │  ''  │   'admin'    │   false    │
 │    1    │   'bob'   │   ''   │   'admin'    │   false    │

Change User to Super Admin

To change a user to a Super Admin, add “–username username” to the above command.


sudo ~unms/app/unms-cli set-superadmin --username bob
            UNMS Users
 │ (index) │ username  │           email           │     role     │ two-factor │
 │    0    │  'larry'  │  ''  │   'admin'    │   false    │
 │    1    │   'bob'   │   ''   │ 'superadmin' │   false    │

Note that there does not appear to be a way to

Ubiquiti set DHCP from command line

Edit the “/tmp/system.cfg”

Change the line that contains “dhcpc.status=disabled” to


add the following lines


Save and exit and save changes

/usr/etc/rc.d/rc.softrestart save

Log into the GUI and verify everything looks correct. Under the network tab it was still showing that it had a static address, although it pulled a DHCP IP.