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NAME | SYNOPSIS | DESCRIPTION | CONFIGURATION FILES | EXAMPLES | FILES | SEE ALSO | AUTHORS | COLOPHON |
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RPC.IDMAPD(8) System Manager's Manual RPC.IDMAPD(8)
rpc.idmapd — NFSv4 ID <-> Name Mapper
rpc.idmapd [-h] [-f] [-v] [-C] [-S] [-p path] [-c path]
rpc.idmapd is the NFSv4 ID <-> name mapping daemon. It provides
functionality to the NFSv4 kernel client and server, to which it
communicates via upcalls, by translating user and group IDs to
names, and vice versa.
The system derives the user part of the string by performing a
password or group lookup. The lookup mechanism is configured in
/etc/idmapd.conf
By default, the domain part of the string is the system's DNS
domain name. It can also be specified in /etc/idmapd.conf if the
system is multi-homed, or if the system's DNS domain name does
not match the name of the system's Kerberos realm.
When the domain is not specified in /etc/idmapd.conf the local
DNS server will be queried for the _nfsv4idmapdomain text record.
If the record exists that will be used as the domain. When the
record does not exist, the domain part of the DNS domain will
used.
Note that on more recent kernels only the NFSv4 server uses
rpc.idmapd. The NFSv4 client instead uses nfsidmap(8), and only
falls back to rpc.idmapd if there was a problem running the
nfsidmap(8) program.
The options are as follows:
-h Display usage message.
-v Increases the verbosity level (can be specified
multiple times).
-f Runs rpc.idmapd in the foreground and prints all
output to the terminal.
-p path Specifies the location of the RPC pipefs to be path.
The default value is "/var/lib/nfs/rpc_pipefs".
-c path Use configuration file path. This option is
deprecated.
-C Client-only: perform no idmapping for any NFS
server, even if one is detected.
-S Server-only: perform no idmapping for any NFS
client, even if one is detected.
rpc.idmapd recognizes the following value from the [general]
section of the /etc/nfs.conf configuration file:
pipefs-directory
Equivalent to -p.
All other settings related to id mapping are found in the
/etc/idmapd.conf configuration file.
rpc.idmapd -f -vvv
Runs rpc.idmapd printing all messages to console, and with a
verbosity level of 3.
/etc/idmapd.conf, /etc/nfs.conf
idmapd.conf(5), nfs.conf(5), nfsidmap(8)
The rpc.idmapd software has been developed by Marius Aamodt
Eriksen ⟨marius@citi.umich.edu⟩.
This page is part of the nfs-utils (NFS utilities) project.
Information about the project can be found at
http://linux-nfs.org/wiki/index.php/Main_Page. If you have a bug
report for this manual page, see
⟨http://linux-nfs.org/wiki/index.php/Main_Page⟩. This page was
obtained from the project's upstream Git repository
⟨git://git.linux-nfs.org/projects/steved/nfs-utils.git⟩ on
2024-06-14. (At that time, the date of the most recent commit
that was found in the repository was 2024-05-10.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
GNU February 3, 2003 RPC.IDMAPD(8)
Pages that refer to this page: nfs(5), nfs.conf(5), nfsconf(8), nfsdclnts(8)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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