Transmission is my favorite client for Linux, Windows and Mac OSX. It is super light and works with all content automation software: Sonarr, SickRage, CouchPotato, Mylar and Headphones. I have found it to be very reliable and easy to set up. This was tested on Ubuntu 15.04 but will work on any Debian system that uses systemd as the default startup service.
When you are done since you are of course using a VPN, you can retain remote access behind the VPN with this guide
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Install Transmission Bittorrent Client Ubuntu 15.x
sudo apt-get update
Install the Transmission torrent client daemon
sudo apt-get install transmission-daemon transmission-cli -y
Stop Transmission so we can modify the systemd script
sudo service transmission-daemon stop
Modify the transmission systemd script variables to use the right settings.json file (updated and fixed)
sudo mkdir -p /etc/systemd/system/transmission-daemon.service.d sudo nano /etc/systemd/system/transmission-daemon.
Add these lines
[Service] ExecStart= ExecStart=/usr/bin/transmission-daemon -f --log-error -g /etc/transmission-daemon
Ctrl+X, Y and Enter to Save
Reload the systemd control daemon so it uses the changes we made
sudo systemctl daemon-reload
Stop the transmission service again
sudo service transmission-daemon stop
Add the Transmission user to your regular user's group which will prevent permission issues as long as you download to hard drives that are owned by your main group (Raspberry Pi and Banana Pi users, if you follow my hard drive mounting tutorial then it will work).
sudo usermod -aG username debian-transmission
Also add your user to the transmission group
sudo usermod -aG debian-transmission username
Give the settings file write and execute permissions
sudo chmod 775 /etc/transmission-daemon/settings.json
Open up the configuration file for editing
sudo nano /etc/transmission-daemon/settings.json
Change the following values.
rpc-whitelist allows IP addresses to access the Web interface it has been set to all here. You can also change it to your local home network like
192.168.*.* if you want it to be more secure. However, if you want to be able to access transmission outside your local network then it should be
*.*.*.* which represents all IPs.
May as well disable the whitelist if you are allowing all IPs
Change the remote access username and password to your liking
"rpc-password": "password", "rpc-username": "username",
Change the download directory to where you want to store your torrent downloads
Set the number of active downloads, 5 may be a bit too much for the Pi to handle
Set the number of torrents to actively seed
Set umask to 002 to avoid permission issues
Ctrl+X, Y and enter to save and restart Transmission
sudo service transmission-daemon restart
Access the Transmission torrent client at http://ip.address:9091 with the username and password you set.
Your downloads folder should have 775 permissions so the transmission user has the correct permissions.
sudo chmod -R 775 /path/to/downloads
If you find Transmission isn't starting on boot properly you can fix it by using Monit to make sure Transmission is always running using this guide.
Fix Transmission Permission Issues with systemd
If you have permission problems still you can change the user transmission runs as
sudo service transmission-daemon stop sudo nano /etc/systemd/system/transmission-daemon.service.d/local.conf
Make sure you have these lines at the top so that the web interface starts after the network is up. This should fix any problems with the Transmission web GUI not being available on boot.
Change the user for Transmission to run as and save with Ctrl+X, Y and Enter.
Ctrl+X, Y and Enter to save
Change the ownership of the Transmission settings file
sudo chown -R htpcguides:htpcguides /etc/transmission-daemon
Reload the transmission systemd script and restart the service
sudo systemctl daemon-reload sudo service transmission-daemon restart
Now since you are of course using a VPN, you can retain remote access behind the VPN with this guide