fedfs-null (8) - Linux Manuals
fedfs-null: send a FEDFS_NULL ADMIN protocol request
NAMEfedfs-null - send a FEDFS_NULL ADMIN protocol request
SYNOPSISfedfs-null [-?d] [-n nettype] [-h hostname] [-s security]
INTRODUCTIONRFC 5716 introduces the Federated File System (FedFS, for short). FedFS is an extensible standardized mechanism by which system administrators construct a coherent namespace across multiple file servers using file system referrals. For further details, see fedfs(7).
FedFS-enabled file servers allow remote administrative access via an authenticated RPC protocol known as the FedFS ADMIN protocol. Using this protocol, FedFS administrators manage FedFS junctions and NSDB connection parameter information on remote FedFS-enabled file servers.
DESCRIPTIONThe fedfs-null(8) command is part of a collection of low-level single-use programs that is intended for testing the FedFS ADMIN protocol or for use in scripts. It sends a single FEDFS_NULL request to a remote FedFS ADMIN protocol service.
- -d, --debug
- Enables debugging messages during operation.
- -?, --help
- Displays fedfs-null(8) version information and a usage message on stderr.
- -h, --hostname=hostname
- Specifies the hostname of a remote FedFS ADMIN service. If this option is not specified, the default value is localhost.
- -n, --nettype=nettype
- Specifies the transport to use when contacting the remote FedFS ADMIN service. Typically the nettype is one of tcp or udp. If this option is not specified, the default value is netpath. See rpc(3t) for details.
- -s, --security=flavor
- Specifies the security flavor to use when contacting the remote FedFS ADMIN service. Valid flavors are sys, unix, krb5, krb5i, and krb5p. If this option is not specified, the unix flavor is used. See the SECURITY section of this man page for details.
EXAMPLESSuppose you are the FedFS administrator of the example.net FedFS domain and that you want to know if the FedFS ADMIN service on the file server fs.example.net is operational. Use:
$ fedfs-null -h fs.example.net
Call completed successfully
SECURITYBy default, or if the sys and unix flavors are specified with the --security=flavor option, the fedfs-create-junction(8) command uses AUTH_SYS security for the Remote Procedure Call. AUTH_SYS has known weaknesses and should be avoided on untrusted networks.
The RPC client uses the Kerberos v5 GSS mechanism if a Kerberos security flavor is specified. When specifying a Kerberos security flavor, the user must first obtain a valid Kerberos ticket using kinit(1) before running fedfs-create-junction(8).
COLOPHONThis page is part of the fedfs-utils package. A description of the project and information about reporting bugs can be found at http://wiki.linux-nfs.org/wiki/index.php/FedFsUtilsProject.
AUTHORChuck Lever <chuck.lever [at] oracle.com>