Manual Pages  — KCM

kcm – process-based credential cache for Kerberos tickets.

SYNOPSIS DESCRIPTION

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 ] [ -door-path= path ] [-S principal | -server= principal ] [-t keytab | -keytab= keytab ] [-u user | -user= user ] [-v | -version]

kcm is a process based credential cache. To use it, set the KRB5CCNAME enviroment 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
-door-path= path
	path to kcm door 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