+The result of this command is the concatenation of the archive
+specified with @option{--file} option and the archives, given in the
+command line. The new, concatenated archive will be called by the
+same name as the one given with the @option{--file} option. As usual,
+if you omit @option{--file}, @command{tar} will use the value of the
+environment variable @env{TAPE}, or, if this has not been set, the
+default archive name.
+
+@FIXME{There is no way to specify a new name...}
+