Ubiquiti

Ubiquiti Unifi is scalable and has a linux controller software, meaning you only need to buy APs and a PC with linux on it (ubuntu recommended) to run the network.

The UAP-Pro can handle 200 concurrent clients and the UAP-LR / LR / UAP-Outdoor can handle 100 simultaneous clients.

The UAP's are very cheap.

There are still some problems apparently though.

Installing the controller on Debian

This needs to run under a desktop environment, so make sure you have one.

echo 'deb http://www.ubnt.com/downloads/unifi/debian stable ubiquiti' | /etc/apt/sources.list.d/100-ubnt-unifi.list
wget -O /etc/apt/trusted.gpg.d/unifi-repo.gpg https://dl.ubnt.com/unifi/unifi-repo.gpg
apt update 
sudo apt install unifi

Then

systemctl enable unifi
systemctl start unifi

visit the controller software at http://localhost:8080

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You may need to change the ports

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Migrating from another controller on another PC

If you are not changing hostname / IP

1. Make sure both controllers are the same version (ie update them both)
2. if necessary upgrade the firmware on the controllers
3. make a backup to an .unf file of the old controller
4. Visit the new controller (using the applet or the website) and restore from a previous backup

If you ARE changing hostname / IP

1. Make sure both controllers are the same version (ie update them both)
2. if necessary upgrade the firmware on the controllers
3. if the IP isn't the same, you still restore from a previous backup and then

When I move the controller, I just go into the GUI on existing controller, under SETTINGS, CONTROLLER, and change the Controller Hostname / IP to the NEW IP ADDRESS, (removing unifi.yourdomain.com) and then check the box "Override inform host with controller hostname/IP" 

Since I have the migrated controller up and running already on the NEW IP ADDRESS, after I shut down the OLD CONTROLER, the new one immediately starts provisioning the WAPS.

1. Make the backup in the controller and
2. make a backup to an .unf file of the old controller
3. Visit the new controller (using the applet or the website) and restore from a previous backup

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files

/var/lib/unifi/data/system.properties

if this doesn't exist

java -jar /usr/lib/unifi/lib/ace.jar discover

/usr/lib/unifi/logs/server.log

/usr/lib/unifi/logs/mongod.log

migrating controller from one machine to another

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