求教.tar.bz2.sig文件的用法

引用:

-b, --detach-sign
                 Make a detached signature.

--verify [[sigfile]  [signed-files]]
                 Assume that sigfile is a signature and verify it without gen-
                 erating any output. With no arguments, the  signature  packet
                 is  read from stdin.  If only a sigfile is given, it may be a
                 complete signature or a detached signature, in which case the
                 signed  stuff  is  expected  in  a file without the ".sig" or
                 ".asc" extension.  With  more  than  1  argument,  the  first
                 should  be  a  detached signature and the remaining files are
                 the signed stuff.  To read the signed stuff from stdin, use -
                 as the second filename.  For security reasons a detached sig-
                 nature cannot read the signed  material  from  stdin  without
                 denoting it in the above way.