Updated Docker container on Ubuntu 16.04 LTS (markdown)

Docker-container-on-Ubuntu-16.04-LTS.md

@@ -2,7 +2,7 @@
 
 Let's start by installing docker from the Docker repository. Execute the following commands:
 
-```
+```bash
 sudo apt -y install linux-image-extra-virtual
 sudo apt-key adv --keyserver hkp://ha.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D && echo "deb https://apt.dockerproject.org/repo ubuntu-xenial main" | sudo tee /etc/apt/sources.list.d/docker.list
 sudo apt update && sudo apt -y install docker-engine
@@ -10,11 +10,13 @@ sudo apt update && sudo apt -y install docker-engine
 
 # Create systemd service file
 
-`sudo nano /etc/systemd/system/docker-radarr.service`
+```bash
+sudo nano /etc/systemd/system/docker-radarr.service
+```
 
 Copy/Paste the following into nano:
 
-```
+```systemd
 [Unit]
 Description=Radarr container
 Requires=docker.service
@@ -30,9 +32,15 @@ ExecStop=/usr/bin/docker stop radarr
 WantedBy=multi-user.target
 ```
 
+Save the file using keyboard combo `Ctrl+o`, exit with `Ctrl+x` and set permissions using the command:
+
+```bash
+sudo chmod 644 /etc/systemd/system/docker-radarr.service
+```
+
 Enable the service on boot and start it:
 
-```
+```bash
 sudo systemctl enable docker-radarr
 sudo systemctl start docker-radarr
 ```
@@ -41,11 +49,13 @@ The first time you'll start the container it can take a while because it will ne
 
 Let's check if it's running:
 
-`sudo systemctl status docker-radarr`
+```bash
+sudo systemctl status docker-radarr
+```
 
 Output should be like this if it's running OK:
 
-```
+```bash
 ● docker-radarr.service - Radarr container
    Loaded: loaded (/etc/systemd/system/docker-radarr.service; enabled; vendor preset: enabled)
    Active: active (running) since ma 2017-01-16 00:29:57 CET; 14h ago
@@ -70,13 +80,30 @@ jan 16 00:30:01 server docker[9946]: [services.d] done.
 
 If you like to stop the container:
 
-`sudo systemctl stop docker-radarr`
+```bash
+sudo systemctl stop docker-radarr
+```
 
 # Updating the docker image
 
 Execute the following commands:
 
-```
+```bash
 sudo docker pull linuxserver/radarr
 sudo systemctl restart docker-radarr
 ```
+
+# Doing some cleanup
+
+With these commands you can do some cleanup of docker images and containers:
+
+```bash
+# Remove leftover containers
+sudo docker ps -a -f status=exited -q | xargs -r sudo docker rm
+
+# Remove leftover images
+sudo docker images --no-trunc -q -f dangling=true | xargs -r sudo docker rmi
+
+# Remove dangling volumes
+sudo docker volume ls -qf dangling=true | xargs -r docker sudo volume rm
+```