安装编译所需的依赖/包：

apt -y install build-essential pkg-config automake libtool python3-pip
apt -y install libboost-dev libboost-system-dev libboost-chrono-dev libboost-random-dev libboost-python-dev libssl-dev libgeoip-dev

编译libtorrent，编译参数注意加上Python3的路径，这样是把libtorrent的binding编译到Python3而不是默认的Python2：

wget https://github.com/arvidn/libtorrent/releases/download/libtorrent-1_2_1/libtorrent-rasterbar-1.2.1.tar.gz
tar -xzvf libtorrent-rasterbar-1.2.1.tar.gz
cd libtorrent-rasterbar-1.2.1
./configure --enable-encryption --enable-python-binding --with-libiconv --with-libgeoip=system CXXFLAGS=-std=c++11 PYTHON=/usr/bin/python3
make -j8
make install
ldconfig

使用pip3安装Deluge所需的依赖/包：

pip3 install twisted pyopenssl simplejson pyxdg chardet geoip setproctitle pillow mako service_identity

注意之前说过Deluge2.0是支持Python3的，所以这里我们也会使用Python3来安装Deluge：

wget https://ftp.osuosl.org/pub/deluge/source/2.0/deluge-2.0.3.tar.xz
tar -xJf deluge-2.0.3.tar.xz
cd deluge-2.0.3
python3 setup.py build
python3 setup.py install

目前我遇到的一个坑是报这个错：

error: pyasn1 0.1.9 is installed but pyasn1<0.5.0,>=0.4.6 is required by {'pyasn1-modules'}

执行下面的命令修复：

pip3 install --upgrade --force-reinstall pyasn1

重新安装一次就行了：

python3 setup.py install

新建deluged的systemd服务：

nano /etc/systemd/system/deluged.service

写入：

[Unit]
Description=Deluge Bittorrent Client Daemon
Documentation=man:deluged
After=network-online.target
[Service]
Type=simple
User=root
Group=root
UMask=007
ExecStart=/usr/local/bin/deluged -d
Restart=on-failure
# Time to wait before forcefully stopped.
TimeoutStopSec=300
[Install]
WantedBy=multi-user.target

新建deluge-web的systemd服务：

nano /etc/systemd/system/deluge-web.service

写入（注意现在Deluge的WEBUI也需要加上-d才是以daemon的方式运行）：

[Unit]
Description=Deluge Bittorrent Client Web Interface
Documentation=man:deluge-web
After=network-online.target deluged.service
Wants=deluged.service
[Service]
Type=simple
User=root
Group=root
UMask=027
# This 5 second delay is necessary on some systems
# to ensure deluged has been fully started
ExecStartPre=/bin/sleep 5
ExecStart=/usr/local/bin/deluge-web -d
Restart=on-failure
[Install]
WantedBy=multi-user.target

管理命令：

systemctl start deluged
systemctl start deluge-web
systemctl enable deluged
systemctl enable deluge-web

总体上来说的话，在Debian9上编译Deluge2.0是没什么大坑的，因为毕竟Debian9的Boost库和gcc编译器的版本都比较新，再加上自带Python3，所以编译起来还是挺容易的。