Linux rpcinfo command
On Unix-like operating systems, the rpcinfo command reports RPC information.
Description
rpcinfo makes an RPC call to an RPC server and reports what it finds.
In the first synopsis, rpcinfo lists all the registered RPC services with rpcbind on host. If host is not specified, the local host is the default. If -s is used, the information is displayed in a concise format.
In the second synopsis, rpcinfo lists all the RPC services registered with rpcbind, version 2. Also, note that the format of the information is different in the first and the second synopsis. This is because the second synopsis is an older protocol used to collect the information displayed (version 2 of the rpcbind protocol).
The third synopsis makes an RPC call to procedure 0 of prognum and versnum on the specified host and reports whether a response was received. The transport is the transport which has to be used for contacting the given service. The remote address of the service is obtained by making a call to the remote rpcbind.
The prognum argument is a number that represents an RPC program number. If a versnum is specified, rpcinfo attempts to call that version of the specified prognum. Otherwise, rpcinfo attempts to find all the registered version numbers for the specified prognum by calling version 0, which is presumed not to exist; if it does exist, rpcinfo attempts to obtain this information by calling an extremely high version number instead, and attempts to call each registered version.
The version number is required for -b and -d options.
Syntax
rpcinfo [-m | -s ] [ host ]
rpcinfo -p [ host ]
rpcinfo -T transport host prognum [ versnum ]
rpcinfo -l [ -T transport ] host prognum versnum
rpcinfo [ -n portnum ] -u host prognum [ versnum ]
rpcinfo [ -n portnum ] -t host prognum [ versnum ]
rpcinfo -a serv_address -T transport prognum [ versnum ]
rpcinfo -b [ -T transport ] prognum versnum
rpcinfo -d [ -T transport ] prognum versnum
Options
| -m | Display a table of statistics of rpcbind operations on the given host. The table shows statistics for each version of rpcbind (versions 2, 3 and 4), giving the number of times each procedure was requested and successfully serviced, the number and type of remote call requests that were made, and information about RPC address lookups that were handled. This is useful for monitoring RPC activities on host. |
| -s | Display a concise list of all registered RPC programs on host. If host is not specified, it defaults to the local host. |
| -p | Probe rpcbind on host using version 2 of the rpcbind protocol, and display a list of all registered RPC programs. If host is not specified, it defaults to the local host. Note that version 2 of the rpcbind protocol was previously known as the portmapper protocol. |
| -t | Make an RPC call to procedure 0 of prognum on the specified host using TCP, and report whether a response was received. This option is made obsolete by the -T option as shown in the third synopsis. |
| -l | Display a list of entries with given prognum and versnum on the specified host. Entries are returned for all transports in the same protocol family as that used to contact the remote rpcbind. |
| -b | Make an RPC broadcast to procedure 0 of the specified prognum and versnum and report all hosts that respond. If transport is specified, it broadcasts its request only on the specified transport. If broadcasting is not supported by any transport, an error message is printed. Use of broadcasting should be limited because of the potential for adverse effect on other systems. |
| -d | Delete registration for the RPC service of the specified prognum and versnum. If transport is specified, unregister the service on only that transport, otherwise unregister the service on all the transports on which it was registered. Only the owner of a service can delete a registration, except the superuser who can delete any service. |
| -u | Make an RPC call to procedure 0 of prognum on the specified host using UDP, and report whether a response was received. This option is made obsolete by the -T option as shown in the third synopsis. |
| -a serv_address | Use serv_address as the (universal) address for the service on transport to ping procedure 0 of the specified prognum and report whether a response was received. The -T option is required with the -a option.
If versnum is not specified, rpcinfo tries to ping all available version numbers for that program number. This option avoids calls to remote rpcbind to find the address of the service. The serv_address is specified in universal address format of the given transport. |
| -n portnum | Use portnum as the port number for the -t and -u options instead of the port number given by rpcbind. Use of this option avoids a call to the remote rpcbind to find out the address of the service. This option is made obsolete by the -a option. |
| -T transport | Specify the transport on which the service is required. If this option is not specified, rpcinfo uses the transport specified in the NETPATH environment variable, or if that is unset or NULL, the transport in the netconfig database is used. This is a generic option, and can be used in conjunction with other options. |
Examples
rpcinfo
Display all of the RPC services of the local host.
rpcinfo cpuhope
Show all RPC services registered with rpcbind on the machine named cpuhope.
rpcinfo -s cpuhope
Same as the above command, but shows more concise information (the default information display can be quite lengthy). Output resembles the following:
program version netid service owner 100000 2,3,4 local,tcp,udp,tcp6,udp6 rpcbind super-user 100008 1 udp,tcp,udp6,tcp6 walld super-user 100002 2,1 udp,udp6 rusersd super-user 100001 2,3,4 udp,udp6 rstatd super-user 100012 1 udp,tcp sprayd super-user 100007 3 udp,tcp ypbind super-user
rpcinfo -T tcp cpuhope prognum versnum
Show whether the RPC service with program number prognum and version versnum is registered on the machine named cpuhope for the transport tcp.
rpcinfo -p
Show all RPC services registered with version 2 of the rpcbind protocol on the local machine.
rpcinfo -d 100008 1
Delete the registration for version 1 of the walld (program number 100008) service for all transports.
rpcinfo -d walld 1
Same as the above example, but specifies walld by name.
Related commands
netstat — Print information about network connections, routing tables, interface statistics, masquerade connections, and multicast memberships.