ownCloud Client supports the following command line switches:

--logwindow
open a window to show log output.
--logfile <filename>
write log output to file <filename>.
--logdir <name>
write each sync log output in a new file in directory <name>
--logexpire <hours>
removes logs older than <hours> hours. (to be used with –logdir)
--logflush
flush the log file after every write.
--confdir <dirname>
Use the given configuration directory.

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