Manual browser: mount_smbfs(8)

MOUNT_SMBFS(8) System Manager's Manual MOUNT_SMBFS(8)


mount_smbfsmount a shared resource from an SMB/CIFS file server


mount_smbfs [-E cs1:cs2] [-I host] [-L locale] [-M crights:srights] [-N] [-O cowner:cgroup/sowner:sgroup] [-R retrycount] [-T timeout] [-W workgroup] [-c case] [-d mode] [-f mode] [-g gid] [-n opt] [-u uid] // user@server/share node


The mount_smbfs command mounts a share from a remote server using SMB/CIFS protocol.

The options are as follows:

-E cs1:cs2
Specifies local (cs1) and server's (cs2) character sets.
-I host
Do not use NetBIOS name resolver and connect directly to host, which can be either a valid DNS name or an IP address.
-L locale
Use locale for lower/upper case conversion routines. Set the locale for case conversion. By default, mount_smbfs tries to use an environment variable LC_* to determine it.
-M crights:srights
Assign access rights to the newly created connection.
Do not ask for a password. At run time, mount_smbfs reads the ~/.nsmbrc file for additional configuration parameters and a password. If no password is found, mount_smbfs prompts for it.
-O cowner:cgroup/sowner:sgroup
Assign owner/group attributes to the newly created connection.
-R retrycount
How many retries should be done before the SMB requester decides to drop the connection.
-T timeout
Timeout in seconds for each request.
-W workgroup
This option specifies the workgroup to be used in the authentication request.
-c case
Set a case option which affects name representation. case can be one of the following:
All existing file names are converted to lower case. Newly created file gets a lower case.
All existing file names are converted to upper case. Newly created file gets an upper case.
-f mode, -d mode
Specify permissions that should be assigned to files and directories. The values must be specified as octal numbers. Default value for the file mode is taken from mount point, default value for the directory mode adds execute permission where the file mode gives read permission.

Note that these permissions can differ from the rights granted by SMB server.

-u uid, -g gid
User ID and group ID assigned to files. The default are owner and group IDs from the directory where the volume is mounted.
The mount_smbfs command will use server as the NetBIOS name of remote computer, user as the remote user name and share as the resource name on a remote server. If your connections are refused, try using the -I option and use a server name of ‘*SMBSERVER’.
Path to mount point.


System wide parameters for smbfs mounts.
Keeps static parameters for connections and other information. See /usr/share/examples/smbfs/dot.nsmbrc for details.


The following example illustrate how to connect to SMB server SAMBA as user GUEST, and mount shares PUBLIC and TMP:

mount_smbfs -I //guest@samba/public /smb/public 
mount_smbfs -I -E koi8-r:cp866 //guest@samba/tmp /smb/tmp

If you keep on getting "Connection reset by peer" errors, try:

mount_smbfs -N -I //'*SMBSERVER'/tmp /smb/tmp

It is possible to use fstab(5) for smbfs mounts:

//guest@samba/public /smb/public smbfs rw,noauto 0 0


smbutil(1), mount(8)


Support for SMBFS first appeared in FreeBSD 4.4. It has been ported to NetBSD and first appeared in NetBSD 2.0.


Boris Popov <>, <>. NetBSD port done by Matt Debergalis <>, and Jaromir Dolecek <>.


The -E option works only if you mount with rump_smbfs(8) instead of mount_smbfs.

The -c option is not implemented yet. It is silently ignored for now.

November 17, 2014 NetBSD 7.0