@item Extract @file{usr/} hierarchy into @file{usr/local/}:
@smallexample
-$ @kbd{tar --transform='s,usr/,usr/local/,' -x arch.tar}
+$ @kbd{tar --transform='s,usr/,usr/local/,' -x -f arch.tar}
@end smallexample
@item Strip two leading directory components (equivalent to
@option{--strip-components=2}):
@smallexample
-$ @kbd{tar --transform='s,/*[^/]*/[^/]*/,,' -x arch.tar}
+$ @kbd{tar --transform='s,/*[^/]*/[^/]*/,,' -x -f arch.tar}
@end smallexample
@item Prepend @file{/prefix/} to each file name:
@smallexample
-$ @kbd{tar --transform 's,^,/prefix/,' -x arch.tar}
+$ @kbd{tar --transform 's,^,/prefix/,' -x -f arch.tar}
@end smallexample
@item Convert each file name to lower case:
@smallexample
-$ @kbd{tar --transform 's/.*/\L&/' -x arch.tar}
+$ @kbd{tar --transform 's/.*/\L&/' -x -f arch.tar}
@end smallexample
@end enumerate