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 activity; this is typically useful when debugging NFS
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.
Specify which module's flags to set or clear. Available
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.
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
2020-05-27. (At that time, the date of the most recent commit that
was found in the repository was 2020-05-26.) 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
5 Jul 2006 rpcdebug(8)