SYNCTHING(1)

NAME
syncthing - Syncthing

SYNOPSIS

syncthing [-audit] [-browser-only] [-generate=<dir>] [-gui-address=<address>] [-gui-apikey=<key>]
          [-home=<dir>] [-logfile=<filename>] [-logflags=<flags>] [-no-browser]
          [-no-console] [-no-restart] [-paths] [-paused] [-reset] [-upgrade] [-upgrade-check]
          [-upgrade-to=<url>] [-verbose] [-version]

DESCRIPTION

Syncthing is an application that lets you synchronize your files across multiple devices. This means the creation, modification or deletion of files on one machine will automatically be replicated to your other devices. We believe your data is your data alone and you deserve to choose where it is stored. Therefore Syncthing does not upload your data to the cloud but exchanges your data across your machines as soon as they are online at the same time.

OPTIONS

-audit
    Write events to audit file.

-generate=<dir>
    Generate key and config in specified dir, then exit.

-gui-address=<address>
    Override GUI address.

-home=<dir>
    Set configuration directory. The default configuration directory is: $HOME/.config/syncthing.

-logfile=<filename>
    Set destination filename for logging (use "-" for stdout, which is the default option).

-logflags=<flags>
    Select information in log line prefix, default 2. The -logflags value is a sum of the following:

•   1: Date

•   2: Time

•   4: Microsecond time

•   8: Long filename

•   16: Short filename

    To prefix each log line with date and time, set -logflags=3 (1 + 2 from above). The value 0 is used to disable all of the above. The default is to show time only (2).

-no-browser
    Do not start a browser.

-no-console
    Hide the console window. (On Windows only)

-no-restart
    Do not restart; just exit.

-paths
    Print the paths used for configuration, keys, database, GUI overrides, default sync folder and the log file.

-reset
    Reset the database.

-upgrade
    Perform upgrade.

-upgrade-check
    Check for available upgrade.

-upgrade-to=<url>
    Force upgrade directly from specified URL.

-verbose
    Print verbose log output.

-version
    Show version.

DEPRECATED OPTIONS

-gui-apikey=<key>
    Override GUI API key (deprecated as of v0.13, to be removed in the future - do not use).

EXIT CODES

0   Success / Shutdown

1   Error

2   Upgrade not available

3   Restarting

4   Upgrading

    Some of these exit codes are only returned when running without a monitor process (with environment variable STNORESTART set). Exit codes over 125 are usually returned by the shell/binary loader/default signal handler. Exit codes over 128+N on Unix usually represent the signal which caused the process to exit. For example, 128 + 9 (SIGKILL) = 137.

DEVELOPMENT SETTINGS

The following environment variables modify Syncthing's behavior in ways that are mostly useful for developers. Use with care. If you start syncthing from within service managers like systemd or supervisor path expansion may not be supported.

STNODEFAULTFOLDER
    Don't create a default folder when starting for the first time. This variable will be ignored anytime after the first run.

STGUIASSETS
    Directory to load GUI assets from. Overrides compiled in assets.

STTRACE
    A comma separated string of facilities to trace. The valid facility strings are:

beacon
    the beacon package

discover
    the discover package

events
    the events package

files
    the files package

http
    the main package; HTTP requests

locks
    the sync package; trace long held locks

net the main package; connections & network messages

model
    the model package

scanner
    the scanner package

stats
    the stats package

upnp
    the upnp package

xdr the xdr package

all all of the above

STPROFILER
    Set to a listen address such as "127.0.0.1:9090" to start the profiler with HTTP access.

STCPUPROFILE
    Write a CPU profile to cpu-$pid.pprof on exit.

STHEAPPROFILE
    Write heap profiles to heap-$pid-$timestamp.pprof each time heap usage increases.

STBLOCKPROFILE
    Write block profiles to block-$pid-$timestamp.pprof every 20 seconds.

STPERFSTATS
    Write running performance statistics to perf-$pid.csv. Not supported on Windows.

STNOUPGRADE
    Disable automatic upgrades.

GOMAXPROCS
    Set the maximum number of CPU cores to use. Defaults to all available CPU cores.

GOGC
    Percentage of heap growth at which to trigger GC. Default is 100. Lower numbers keep peak memory usage down, at the price of CPU usage (ie. performance).

SEE ALSO

syncthing-config(5), syncthing-stignore(5), syncthing-device-ids(7), syncthing-security(7), syncthing-networking(7), syncthing-versioning(7), syncthing-faq(7)

AUTHOR
The Syncthing Authors

COPYRIGHT
2015, The Syncthing Authors