.K5LOGIN(5) - phpMan

K5LOGIN(5)                                 MIT Kerberos                                K5LOGIN(5)



NAME
       k5login - Kerberos V5 acl file for host access

DESCRIPTION
       The  .k5login  file, which resides in a user's home directory, contains a list of the Ker-
       beros principals.  Anyone with valid tickets for a principal in the file is  allowed  host
       access  with the UID of the user in whose home directory the file resides.  One common use
       is to place a .k5login file in root's home directory, thereby granting system  administra-
       tors remote root access to the host via Kerberos.

EXAMPLES
       Suppose  the user alice had a .k5login file in her home directory containing just the fol-
       lowing line:

          bob AT FOOBAR.ORG

       This would allow bob to use Kerberos network  applications,  such  as  ssh(1),  to  access
       alice's  account,  using  bob's  Kerberos  tickets.   In  a  default  configuration  (with
       k5login_authoritative set to true in krb5.conf(5)), this .k5login file would not let alice
       use  those  network  applications to access her account, since she is not listed!  With no
       .k5login file, or with k5login_authoritative set to false, a default rule would permit the
       principal alice in the machine's default realm to access the alice account.

       Let  us  further suppose that alice is a system administrator.  Alice and the other system
       administrators would have their principals in root's .k5login file on each host:

          alice AT BLEEP.COM

          joeadmin/root AT BLEEP.COM

       This would allow either system administrator to log in to these hosts using their Kerberos
       tickets  instead  of  having to type the root password.  Note that because bob retains the
       Kerberos tickets for his own principal, bob AT FOOBAR.ORG, he would not have any of the priv-
       ileges  that  require  alice's tickets, such as root access to any of the site's hosts, or
       the ability to change alice's password.

SEE ALSO
       kerberos(1)

AUTHOR
       MIT

COPYRIGHT
       1985-2017, MIT




1.15.1                                                                                 K5LOGIN(5)

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