or download this
log4perl.appender.myFILE = Log::Log4perl::Appender::File
log4perl.appender.myFILE.filename = $logfile_name
log4perl.appender.myFILE.create_at_logtime = 1
...
log4perl.appender.myFILE.umask = 0000,
log4perl.appender.myFILE.layout = Log::Log4perl::Layout::Pattern
+Layout
log4perl.appender.myFILE.layout.ConversionPattern = [%p][%d{HH:mm}
+]: %m%n