+.SH "CONFIGURATION OVERWRITE"
+.PP
+Most command allow to overwrite any configuration parameter on the command line with the -o option.
+.PP
+-o NAME=value
+.PP
+eg. -o runtapes=2
+.PP
+eg. -o DUMPTYPE:no-compress:compress="server fast"
+.PP
+eg. -o TAPETYPE:HP-DAT:length=2000m
+.PP
+eg. -o INTERFACE:local:use="2000 kbps"