KCM(8)

NAME
kcm - process-based credential cache for Kerberos tickets.

SYNOPSIS
kcm [- -cache-name=cachename] [-c file - -config-file=file] [-g group - -group=group] [- -max-request=size] [- -disallow-getting-krbtgt] [- -detach] [-h | - -help] [-k principal - -system-principal=principal] [-l time - -lifetime=time] [-m mode - -mode=mode] [-n | - -no-name-constraints] [-r time - -renewable-life=time] [-s path - -socket-path=path] [-S principal - -server=principal] [-t keytab - -keytab=keytab] [-u user - -user=user] [-v | - -version]

DESCRIPTION
kcm is a process based credential cache. To use it, set the KRB5CCNAME environment variable to ‘KCM:uid’ or add the stanza

    [libdefaults]
            default_cc_name = KCM:%{uid}

to the /etc/krb5.conf configuration file and make sure kcm is started in the system startup files.

The kcm daemon can hold the credentials for all users in the system. Access control is done with Unix-like permissions. The daemon checks the access on all operations based on the uid and gid of the user. The tickets are renewed as long as is permitted by the KDC's policy.

The kcm daemon can also keep a SYSTEM credential that server processes can use to access services. One example of usage might be an nss_ldap module that quickly needs to get credentials and doesn't want to renew the ticket itself.

Supported options:

- -cache-name=cachename
    system cache name

-c file, - -config-file=file
    location of config file

-g group, - -group=group
    system cache group

- -max-request=size
    max size for a kcm-request

- -disallow-getting-krbtgt
    disallow extracting any krbtgt from the kcm daemon.

- -detach
    detach from console

-h, - -help

-k principal, - -system-principal=principal
    system principal name

-l time, - -lifetime=time
    lifetime of system tickets

-m mode, - -mode=mode
    octal mode of system cache

-n, - -no-name-constraints
    disable credentials cache name constraints

-r time, - -renewable-life=time
    renewable lifetime of system tickets

-s path, - -socket-path=path
    path to kcm domain socket

-S principal, - -server=principal
    server to get system ticket for

-t keytab, - -keytab=keytab
    system keytab name

-u user, - -user=user
    system cache owner

-v, - -version