Debian/Ubuntu Packages

To allow the system to check the packages authenticity, you need to provide the release key.

# Add the release PGP keys:
sudo curl -s -o /usr/share/keyrings/syncthing-archive-keyring.gpg https://syncthing.net/release-key.gpg

The stable channel is updated with stable release builds, usually every first Tuesday of the month.

# Add the "stable" channel to your APT sources:
echo "deb [signed-by=/usr/share/keyrings/syncthing-archive-keyring.gpg] https://apt.syncthing.net/ syncthing stable" | sudo tee /etc/apt/sources.list.d/syncthing.list

The candidate channel is updated with release candidate builds, usually every second Tuesday of the month. These predate the corresponding stable builds by about three weeks.

# Add the "candidate" channel to your APT sources:
echo "deb [signed-by=/usr/share/keyrings/syncthing-archive-keyring.gpg] https://apt.syncthing.net/ syncthing candidate" | sudo tee /etc/apt/sources.list.d/syncthing.list

To make sure the system packages do not take preference over those in this repository, you need to adjust the priority/preference.

# Increase preference of Syncthing's packages ("pinning")
printf "Package: *\nPin: origin apt.syncthing.net\nPin-Priority: 990\n" | sudo tee /etc/apt/preferences.d/syncthing

And finally.

# Update and install syncthing:
sudo apt-get update
sudo apt-get install syncthing

Depending on your distribution, you may see an error similar to the following when running apt-get:

E: The method driver /usr/lib/apt/methods/https could not be found.
N: Is the package apt-transport-https installed?
E: Failed to fetch https://apt.syncthing.net/dists/syncthing/InRelease

If so, please install the apt-transport-https package and try again:

sudo apt-get install apt-transport-https

If you insist, you can also use the above URLs with http instead of https.