===== Installation of certificates =====

==== Obtaining a personal grid certificate ====

  * Request a user certificate by following the instructions on the [[https://ca.dutchgrid.nl/|Dutchgrid Certification Authority website]]. A good starting point for finding your certificate authority if not available from this site is: [[https://www.eugridpma.org/members/worldmap/|https://www.eugridpma.org/members/worldmap/]] (Europe) or [[http://www.igtf.net/|http://www.igtf.net/]] (World wide). Contact Science Data Centre Operations group if none of the above works.
  * Install the certificate by following the instructions provided by your certificate authority. Typically this involves:

  - Save the mail with the signed certificate as ''$HOME/.globus/usercert.pem''  and make sure that the ''userkey.pem''  file in that directory contains the pricate key that matches this certificate. As these ''*.pem''  files are strictly personal, their permissions should be set properly by the following command: \\ ''> chmod 600 *.pem''
  - Load the certificate into your web browser. See e.g. [[http://ca.dutchgrid.nl/info/browser|http://ca.dutchgrid.nl/info/browser]] for instructions.
  - Apply for authorization to use LOFAR resources:
      * [[https://voms.grid.sara.nl:8443/voms/lofar|https://voms.grid.sara.nl:8443/voms/lofar]] for access to the LOFAR LTA storage.