Home > Storage > PowerScale (Isilon) > Product Documentation > Protocols > Dell Multipath Client Driver: Installation and Configuration Guide > The ‘dellnfs-ctl’ utility
Additionally, a ‘dellnfs-ctl’ CLI tool comes packaged with the multipath driver module and is automatically available on the Linux client after the driver module installation.
The command usage syntax for the ‘dellnfs-ctl’ tool is as follows:
# dellnfs-ctl
syntax: /usr/bin/dellnfs-ctl [reload/status/trace]
Note: To operate it in trace mode, the ‘dellnfs-ctl’ tool requires the ‘trace-cmd’ package to be installed.
For example, the trace-cmd package can be installed on an Ubuntu Linux system using the ‘apt install’ package utility command:
# sudo apt install trace-cmd
The current version of the dellnfs-ctl tool, plus the associated services and kernel modules, can be queried with the following CLI command syntax:
# dellnfs-ctl status
version: 4.0.22-dell
kernel modules: sunrpc rpcrdma compat_nfs_ssc lockd nfs_acl auth_rpcgss rpcsec_gss_krb5 nfs nfsv3 nfsv4
services: rpcbind.socket rpcbind rpc-gssd rpc_pipefs: /run/rpc_pipefs
With the ‘reload’ option, the ‘dellnfs-ctl’ tool uses ‘modprobe’ to reload and restart the NFS RPC services. For example:
# dellnfs-ctl reload
dellnfs-ctl: stopping service rpcbind.socket
dellnfs-ctl: umounting fs /run/rpc_pipefs
dellnfs-ctl: unloading kmod nfsv3
dellnfs-ctl: unloading kmod nfs
dellnfs-ctl: unloading kmod nfs_acl
dellnfs-ctl: unloading kmod lockd
dellnfs-ctl: unloading kmod compat_nfs_ssc
dellnfs-ctl: unloading kmod rpcrdma
dellnfs-ctl: unloading kmod sunrpc
dellnfs-ctl: loading kmod sunrpc
dellnfs-ctl: loading kmod rpcrdma
dellnfs-ctl: loading kmod compat_nfs_ssc
dellnfs-ctl: loading kmod lockd
dellnfs-ctl: loading kmod nfs_acl
dellnfs-ctl: loading kmod nfs
dellnfs-ctl: loading kmod nfsv3
dellnfs-ctl: mounting fs /run/rpc_pipefs
dellnfs-ctl: starting service rpcbind.socket
dellnfs-ctl: starting service rpcbind
In the event that a problem is detected, it is important to run the reload script before uninstalling or reinstalling the driver. Because the script runs modprobe, the kernel modules that are modified by the driver will be reloaded.
Note: This will affect existing NFS mounts. As such, any active mounts will need to be re-mounted after a reload is performed.