# idmapd - man(8) - [phpMan]

[_RPC.IDMAPD_(8)](https://www.chedong.com/phpMan.php/man/RPC.IDMAPD/8/markdown)                          System Manager's Manual                         [_RPC.IDMAPD_(8)](https://www.chedong.com/phpMan.php/man/RPC.IDMAPD/8/markdown)

## NAME
       rpc.idmapd — NFSv4 ID <-> Name Mapper

## SYNOPSIS
       **rpc.idmapd **[**-h**] [**-f**] [**-v**] [**-C**] [**-S**] [**-p _**path_] [**-c _**path_]

## DESCRIPTION
       **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 in‐
       stead uses [_nfsidmap_(8)](https://www.chedong.com/phpMan.php/man/nfsidmap/8/markdown), and only falls back to **rpc.idmapd **if there was a problem running  the
       [_nfsidmap_(8)](https://www.chedong.com/phpMan.php/man/nfsidmap/8/markdown) program.

       The options are as follows:

### -h           

### -v           

### -f           

### -p _
                    "/var/lib/nfs/rpc_pipefs".

### -c _

### -C           

### -S           

## CONFIGURATION FILES
       **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.

## EXAMPLES
### rpc.idmapd -f -vvv

       Runs **rpc.idmapd **printing all messages to console, and with a verbosity level of 3.

## FILES
       _/etc/idmapd.conf_, _/etc/nfs.conf_

## SEE ALSO
       [_idmapd.conf_(5)](https://www.chedong.com/phpMan.php/man/idmapd.conf/5/markdown), [_nfs.conf_(5)](https://www.chedong.com/phpMan.php/man/nfs.conf/5/markdown), [_nfsidmap_(8)](https://www.chedong.com/phpMan.php/man/nfsidmap/8/markdown)

## AUTHORS
       The **rpc.idmapd **software has been developed by Marius Aamodt Eriksen ⟨<marius@citi.umich.edu>⟩.

Debian                                    February 3, 2003                             [_RPC.IDMAPD_(8)](https://www.chedong.com/phpMan.php/man/RPC.IDMAPD/8/markdown)