Used resources:
https://my.vps6.net/knowledgebase/64/How-to-Install-rTorrentorruTorrent-Seedbox-on-Ubuntu-VPS.html
https://rtorrent.net/downloads/
https://rakshasa.github.io/rtorrent/
https://terminal28.com/how-to-install-and-configure-rutorrent-rtorrent-libtorrent-xmlrpc-screen-debian-8-jessie/

This tutorial will guide you through the installation of libtorrent 0.13.8, rTorrent 0.9.8, and the ruTorrent Web UI (3.8) on a Debian or Ubuntu system. It has been tested with Debian 6 (x64) and Ubuntu 11.04 (x64).

To begin, access your VPS via SSH and run the following to update your platform and install some needed dependencies:

# apt-get update
# apt-get upgrade
# apt-get install subversion build-essential automake libtool libcppunit-dev libssl-dev libcurl3-dev libsigc++-2.0-dev mediainfo ffmpeg unzip curl libncurses-dev apache2 php7.1 php7.1-cli php7.3-curl


Enable scgi for Apache:

# apt-get install libapache2-mod-scgi

# ln -s /etc/apache2/mods-available/scgi.load /etc/apache2/mods-enabled/scgi.load


Install XMLRPC:

# mkdir /install;cd /install

# svn checkout http://svn.code.sf.net/p/xmlrpc-c/code/stable xmlrpc-c

# cd xmlrpc-c

# ./configure --disable-cplusplus

# make

# make install


Intall libtorrent:

# cd /install

# wget https://github.com/rakshasa/rtorrent-archive/raw/master/libtorrent-0.13.8.tar.gz

# tar xvf libtorrent-0.13.8.tar.gz

# cd libtorrent-0.13.8

# ./autogen.sh

# ./configure

# make

# make install


Install rTorrent:

# cd /install

# wget https://github.com/rakshasa/rtorrent-archive/raw/master/rtorrent-0.9.8.tar.gz

# tar xvf rtorrent-0.9.8.tar.gz

# cd rtorrent-0.9.8

# ./autogen.sh

# ./configure --with-xmlrpc-c

# make

# make install

# ldconfig


Create required directories:

# mkdir /mnt/mydisk/torrents
# mkdir /mnt/mydisk/torrents/rtorrent

# mkdir /mnt/mydisk/torrents/rtorrent/.session

# mkdir /mnt/mydisk/torrents/rtorrent/watch

# mkdir /mnt/mydisk/torrents/rtorrent/download

# rm /mnt/mydisk/torrents/rtorrent/.session/*.*

setup .rtorrent.rc file (rTorrent config):

# cd ~/

# wget http://vps6.net/src/.rtorrent.rc
 ~/.rtorrent.rc

# cp .rtorrent.rc /mnt/mydisk/torrents/



(Edit the settings in .rtorrent.rc, like max upload/download speed, max connected peers, etc, as needed.)

Install RUTorrent:

# cd /install

# wget https://github.com/Novik/ruTorrent/archive/v3.8.tar.gz

# tar xvf v3.8.tar.gz

# mv ruTorrent-3.8  rutorrent

# mv rutorrent /var/www/html

# rm -rf /var/www/html/rutorrent/plugins/darkpal

# chown -R www-data:www-data /var/www/html/rutorrent


Secure /rutorrent:

# a2enmod ssl

# a2enmod auth_digest

# a2enmod scgi

# openssl req $@ -new -x509 -days 365 -nodes -out /etc/apache2/apache.pem -keyout /etc/apache2/apache.pem

# chmod 600 /etc/apache2/apache.pem

# htdigest -c /etc/apache2/passwords seedbox seeder1

(Enter a password of your choice when prompted, you will use this to log in to the ruTorrent web UI.)

# cd /etc/apache2/sites-available/

# rm -rf default
# wget http://vps6.net/src/default
# rm default-ssl.conf
# mv default default-ssl.conf

# a2ensite default-ssl

# /etc/init.d/apache2 reload


Install unrar-nonfree:
# cd /install
# wget http://ftp.ee.debian.org/debian/pool/non-free/u/unrar-nonfree/unrar_6.1.2-1_armhf.deb
# dpkg -i unrar_6.1.2-1_armhf.deb


Install screen:

# apt-get install screen

Start rTorrent in a detached shell using screen:

# screen -fa -d -m rtorrent


##################################################

Set auto restart afrer reboot:


nano -w /etc/init.d/rtorrent

<code>

#! /bin/sh
# rTorrent init script
#

case "$1" in
  start)
   echo "Starting rtorrent..."
    su root -c 'screen -dmS rtorrent rtorrent'
    ;;
  stop)
   echo "Stopping rtorrent..."
   killall -s 2 rtorrent
    ;;
  *)
    echo "Usage: $0 {start|stop}"
    exit 1
    ;;
esac

exit 0

</code>


chmod 755 /etc/init.d/rtorrent

update-rc.d rtorrent defaults