diff --git a/unifi/readme.md b/unifi/readme.md
new file mode 100644
index 0000000..ea94be4
--- /dev/null
+++ b/unifi/readme.md
@@ -0,0 +1,104 @@
+# UniFi Controller
+
+###### guide-by-example
+
+![logo](https://i.imgur.com/xm6yo3I.png)
+
+# Purpose & Overview
+
+Ubiquiti managment utility for wifi access points and other hardware.<br>
+
+* [Official site](https://www.ui.com/software/)
+* [Manual](https://dl.ui.com/guides/UniFi/UniFi_Controller_V5_UG.pdf)
+* [linuxserver github](https://github.com/linuxserver/docker-unifi-controller)
+
+UniFi is a web based managment software for Ubiquiti devices.<br>
+
+Docker image used here is provided by [linuxserver.io](https://www.linuxserver.io/)
+
+# Files and directory structure
+
+```
+/home/
+└── ~/
+    └── docker/
+        └── unifi/
+            ├── config/
+            ├── .env
+            └── docker-compose.yml
+```
+
+* `config/` - a directory where unifi stores its coniguration data
+* `.env` - a file containing environment variables for docker compose
+* `docker-compose.yml` - a docker compose file, telling docker
+  how to run the containers
+
+You only need to provide the files.</br>
+The directory is created by docker compose on the first run.
+
+# docker-compose
+
+`docker-compose.yml`
+```yml
+version: "2.1"
+services:
+  unifi-controller:
+    image: linuxserver/unifi-controller:LTS
+    container_name: unifi
+    hostname: unifi
+    restart: unless-stopped
+    env_file: .env
+    ports:
+      - 3478:3478/udp
+      - 10001:10001/udp
+      - 8080:8080
+      - 8081:8081
+      - 8443:8443
+      - 8843:8843
+      - 8880:8880
+      - 6789:6789
+    volumes:
+      - ./config:/config
+```
+
+`.env`
+```bash
+# GENERAL
+TZ=Europe/Bratislava
+
+#LINUXSERVER.IO
+PUID=1000
+PGID=1000
+MEM_LIMIT=1024M #optional
+```
+
+# Configuration
+
+For adoption of APs when the controller runs on docker network:
+
+* *Settings > Controller > Controller Settings*<br>
+  `Controller Hostname/IP` **set to the IP of the docker host**,<br>
+  assuming it is on the same network as the APs
+*  **check** `Override inform host with controller hostname/IP`
+
+# Update
+
+Manual image update:
+
+- `docker-compose pull`</br>
+- `docker-compose up -d`</br>
+- `docker image prune`
+
+# Backup and restore
+
+#### Backup
+
+Using [borg](https://github.com/DoTheEvo/selfhosted-apps-docker/tree/master/borg_backup)
+that makes daily snapshot of the entire directory.
+  
+#### Restore
+
+* down the unifi container `docker-compose down`</br>
+* delete the entire unifi directory</br>
+* from the backup copy back the unifi directory</br>
+* start the container `docker-compose up -d`
diff --git a/wireguard/readme.md b/wireguard/readme.md
index e08f5b2..aaf4540 100644
--- a/wireguard/readme.md
+++ b/wireguard/readme.md
@@ -1,7 +1,5 @@
 # WireGuard
 
-# Work in progress
-
 ###### guide-by-example
 
 ![logo](https://i.imgur.com/IRgkp2o.png)
@@ -39,7 +37,7 @@ Most of the stuff here is based on Arch wiki and
 # Installation
 
 ### on linux
-Install `wireguard-tools` or whatever is the equivalent in your distro.<br>
+Install `wireguard-tools` package, or whatever is the equivalent in your distro.<br>
 The package should provide two command line utilities
  
 * `wg` -  utility for configuration and management of WireGuard tunnel interfaces
@@ -165,6 +163,8 @@ Endpoint = 63.123.113.495:51820
 
 # Extra info
 
+* `sudo wg show`</br>
+shows current wireguard interface status, latest handshake, and parts of the configuration.
 * **PersistentKeepalive**<br>
 Set in clients `[Peer]` section to the number of seconds, `PersistentKeepalive = 25`<br>
 Used for specific case where clients need to communicate with other clients