====== Install Syncthing ======

Syncthing replaces proprietary sync and cloud services with something open, trustworthy and decentralized. It is an alternative to [[linux:install:btsync|BitTorrent Sync]] and doesn't have the "stigma" associated with the "BitTorrent" phrase. I use this program to keep files synchronized between systems. Like my BitTorrent Sync installs, I have one server sitting in the "cloud" that is always on so that my various systems can always have the latest copies of the files and I don't have to deal with port-forwarding on firewalls. This "cloud" server typically is a Linux VPS system...

<code bash>

wget -nv -O - https://syncthing.net/release-key.txt | sudo apt-key add

sudo add-apt-repository "deb https://apt.syncthing.net/ syncthing release" 

sudo apt update
sudo apt install -y syncthing

syncthing --version

sudo mkdir -p /opt/syncthing

sudo syncthing -home="/opt/syncthing" -generate="/opt/syncthing"

sudo sed -i 's/<upnpEnabled>true<\/upnpEnabled>/<upnpEnabled>false<\/upnpEnabled>/g' /opt/syncthing/config.xml

sudo useradd -M syncthing

sudo chown -R syncthing:syncthing /opt/syncthing
</code>

===== Configure a startup script =====

<code>
cat > /tmp/syncthing.service << EOF
[Unit]
Description=Syncthing Server
Documentation=

Wants=network.target
After=network.target

[Service]
User=syncthing
Group=syncthing
KillMode=process
SuccessExitStatus=3 4
RestartForceExitStatus=3 4

WorkingDirectory=/opt/syncthing
ExecStart=/usr/bin/syncthing -home="/opt/syncthing" -logfile="/var/log/syncthing.log"

[Install]
WantedBy=multi-user.target
EOF

sudo mv /tmp/syncthing.service /etc/systemd/system/
sudo chown root:root /etc/systemd/system/syncthing.service

sudo systemctl enable syncthing.service

sudo touch /var/log/syncthing.log
sudo chown syncthing /var/log/syncthing.log

cat > /tmp/syncthing << EOF
/var/log/syncthing
{
        rotate 4
        weekly
        missingok
        notifempty
        compress
        delaycompress
 }
EOF
sudo mv /tmp/syncthing /etc/logrotate.d/
sudo chown root:root /etc/logrotate.d/syncthing
</code>

===== Start Syncthing Service =====
<code>
sudo service syncthing start
</code>