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ktab


       ktab  allows  the  user  to manage the principal names and
       service keys stored in a local key  table.  Principal  and
       key pairs listed in the keytab allow services running on a
       host to authenticate themselves to  the  Key  Distribution
       Center  (KDC).  Before  a  server can be setup to use Ker­
       beros, the user must setup a keytab on  the  host  running
       the server. Note that any updates made to the keytab using
       ktab do not affect the Kerberos database.  If  you  change
       the keys in the keytab, you must also make the correspond­
       ing changes to the Kerberos database.


SYNOPSIS

       ktab [ commands ]


DESCRIPTION

       ktab manages principal name  and  key  pairs  in  the  key
       table.   ktab  allows  the  user  to  list, add, update or
       delete principal names and key pairs  in  the  key  table.
       None of these operations affect the Kerberos database.

       Keytab

       A  keytab  is  a  host's copy of its own keylist, which is
       analogous to a user's password. An application server that
       needs  to authenticate itself to the Key Distribution Cen­
       ter (KDC) must have a keytab which contains its own  prin­
       cipal  and key.  Just as it is important for users to pro­
       tect their passwords, it is equally important for hosts to
       protect  their  keytabs.  You  should  always store keytab
       files on the local disk and make  them  readable  only  by
       root.   You should never send a keytab file over a network
       in the clear.


COMMANDS

       Usage: The command line options are not case sensitive.

       ktab -help

       ktab -l [-k <keytab_name>]

       ktab [-a <principal_name> <password>] [-k <keytab_name>]

       ktab [-d <principal_name>] [-k <keytab_name>]

       -l     List the keytab name and entries.

       -a     <principal_name> <password> Add  an  entry  to  the
              keytab.   No  changes  are  made  to  the  Kerberos
              database. (DO NOT SPECIFY YOUR PASSWORD ON  COMMAND
              LINE OR IN A SCRIPT.)

       will be prompted for your password):

       ktab -a duke@java.sun.com

       To delete a principal from the key table:

       ktab -d duke@java.sun.com


SECURITY ALERT

       Do not specify your password on the command  line.   Doing
       so is a security hole. For example, an attacker could dis­
       cover your password while running the Unix ps command.

                           21 Oct 2002                    ktab(1)
  




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