dirmngr-client(1)


NAME

   dirmngr-client - Tool to access the Dirmngr services

SYNOPSIS

   dirmngr-client [options] [certfile|pattern]

DESCRIPTION

   The  dirmngr-client  is  a simple tool to contact a running dirmngr and
   test whether a certificate has been revoked --- either by being  listed
   in  the  corresponding  CRL  or  by  running  the OCSP protocol.  If no
   dirmngr is running, a new instances will be  started  but  this  is  in
   general not a good idea due to the huge performance overhead.

   The usual way to run this tool is either:

     dirmngr-client acert

   or

     dirmngr-client <acert

   Where  acert  is  one  DER  encoded  (binary)  X.509 certificates to be
   tested.

RETURN VALUE

   dirmngr-client returns these values:

   0      The certificate under question is valid; i.e. there is  a  valid
          CRL  available  and  it  is not listed there or the OCSP request
          returned that that certificate is valid.

   1      The certificate has been revoked

   2 (and other values)
          There was  a  problem  checking  the  revocation  state  of  the
          certificate.   A  message  to  stderr  has  given  more detailed
          information.  Most likely this is due to a  missing  or  expired
          CRL or due to a network problem.

OPTIONS

   dirmngr-client may be called with the following options:

   --version
          Print  the program version and licensing information.  Note that
          you cannot abbreviate this command.

   --help, -h
          Print a usage message summarizing the most  useful  command-line
          options.  Note that you cannot abbreviate this command.

   --quiet, -q
          Make  the  output  extra  brief by suppressing any informational
          messages.

   -v

   --verbose
          Outputs additional information while running.  You can  increase
          the  verbosity  by  giving  several verbose commands to dirmngr,
          such as '-vv'.

   --pem  Assume that the given certificate is in PEM (armored) format.

   --ocsp Do the check using the OCSP protocol and ignore any CRLs.

   --force-default-responder
          When checking using the OCSP  protocl,  force  the  use  of  the
          default  OCSP  responder.   That  is  not to use the Reponder as
          given by the certificate.

   --ping Check whether the dirmngr daemon is up and running.

   --cache-cert
          Put the given certificate into the cache of a  running  dirmngr.
          This is mainly useful for debugging.

   --validate
          Validate   the   given   certificate  using  dirmngr's  internal
          validation code.  This is mainly useful for debugging.

   --load-crl
          This command expects a list of filenames with  DER  encoded  CRL
          files.   With  the  option  --url  URLs are expected in place of
          filenames and they are loaded directly from the given  location.
          All CRLs will be validated and then loaded into dirmngr's cache.

   --lookup
          Take the remaining arguments and run a lookup command on each of
          them.  The results are Base-64 encoded outputs  (without  header
          lines).   This  may  be  used  to  retrieve  certificates from a
          server. However the output format is not  very  well  suited  if
          more than one certificate is returned.

   --url
   -u     Modify the lookup and load-crl commands to take an URL.

   --local
   -l     Let the lookup command only search the local cache.

   --squid-mode
          Run  dirmngr-client  in  a mode suitable as a helper program for
          Squid's external_acl_type option.

SEE ALSO

   dirmngr(8), gpgsm(1)

   The full documentation for this tool is maintained as a Texinfo manual.
   If  GnuPG and the info program are properly installed at your site, the
   command

     info gnupg

   should give  you  access  to  the  complete  manual  including  a  menu
   structure and an index.





Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.





Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.


Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.





Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.


Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.





Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.


Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.