rpcdebug Man page

rpcdebug(8) System Manager’s Manual rpcdebug(8)


rpcdebug – set and clear NFS and RPC kernel debug flags


rpcdebug -vh
rpcdebug -m module
rpcdebug -m module -s flags…
rpcdebug -m module -c flags…


The rpcdebug command allows an administrator to set and clear the Linux
kernel’s NFS client and server debug flags. Setting these flags causes
the kernel to emit messages to the system log in response to NFS activ‐
ity; this is typically useful when debugging NFS problems.

The first form in the synopsis can be used to list all available debug
flags. The second form shows the currently set debug flags for the
given module. The third form sets one or more flags, and the fourth
form clears one or more flags.

The value all may be used to set or clear all the flags for the given


-c Clear the given debug flags.

-h Print a help message and exit. When combined with the -v
option, also prints the available debug flags.

-m module
Specify which module’s flags to set or clear. Available modules

nfsd The NFS server.

nfs The NFS client.

nlm The Network Lock Manager, in either an NFS client or

rpc The Remote Procedure Call module, in either an NFS client
or server.

-s Set the given debug flags.

-v Increase the verbosity of rpcdebug’s output.

procfs-based interface to kernel debug flags.


rpc.nfsd(8), nfs(5), syslogd(8).


Bugs can be found or reported at http://nfs.sf.net/.


Program by Olaf Kirch and .
Manpage by Greg Banks .

5 Jul 2006 rpcdebug(8)