MOUNT.CIFS(8)MOUNT.CIFS(8)NAMEmount.cifs - mount using the Common Internet File System (CIFS)
SYNOPSISmount.cifs {service} {mount-point} [-o options]
DESCRIPTION
This tool is part of the Samba(7) suite.
mount.cifs mounts a Linux CIFS filesystem. It is usually invoked indi‐
rectly by the mount(1m) command when using the "-t cifs" option. This
command only works in Linux, and the kernel must support the cifs
filesystem. The CIFS protocol is the successor to the SMB protocol and
is supported by most Windows servers and many other commercial servers
and Network Attached Storage appliances as well as by the popular Open
Source server Samba.
The mount.cifs utility attaches the UNC name (exported network
resource) to the local directory mount-point. It is possible to set the
mode for mount.cifs to setuid root to allow non-root users to mount
shares to directories for which they have write permission.
Options to mount.cifs are specified as a comma-separated list of
key=value pairs. It is possible to send options other than those listed
here, assuming that cifs supports them. If you get mount failures,
check your kernel log for errors on unknown options.
mount.cifs is a daemon. After mounting it keeps running until the
mounted resource is unmounted (usually via the umount utility)
OPTIONS
username=arg
specifies the username to connect as. If this is not given, then
the environment variable USER is used. This option can also take
the form "user%password" or "user/workgroup" or "user/work‐
group%password" to allow the password and workgroup to be speci‐
fied as part of the username.
password=arg
specifies the CIFS password. If this option is not given then
the environment variable PASSWD is used. If it can find no pass‐
word mount.cifs will prompt for a passeword, unless the guest
option is given.
Note that password which contain the arguement delimiter charac‐
ter (i.e. a comma ',') will failed to be parsed correctly on the
command line. However, the same password defined in the PASSWD
environment variable or a credentials file (see below) will be
read correctly.
credentials=filename
specifies a file that contains a username and/or password. The
format of the file is:
username = value
password = value
This is preferred over having passwords in plaintext in a shared
file, such as /etc/fstab. Be sure to protect any credentials
file properly.
uid=arg
sets the uid that will own all files on the mounted filesystem.
It may be specified as either a username or a numeric uid. This
parameter is ignored when the target server supports the CIFS
Unix extensions.
gid=arg
sets the gid that will own all files on the mounted filesystem.
It may be specified as either a groupname or a numeric gid. This
parameter is ignored when the target server supports the CIFS
Unix extensions.
port=arg
sets the port number on the server to attempt to contact to
negotiate CIFS support. If the CIFS server is not listening on
this port or if it is not specified, the default ports will be
tried i.e. port 445 is tried and if no response then port 139 is
tried.
file_mode=arg
If the server does not support the CIFS Unix extensions this
overrides default file mode which will be used locally.
dir_mode=arg
If the server does not support the CIFS Unix extensions this
overrides the default mode for directories.
ip=arg sets the destination host or IP address.
domain=arg
sets the domain (workgroup) of the user
guest don't prompt for a password
ro mount read-only
rw mount read-write
rsize default network read size
wsize default network write size
ENVIRONMENT VARIABLES
The variable USER may contain the username of the person using the
client. This information is used only if the protocol level is high
enough to support session-level passwords. The variable can be used to
set both username and password by using the format username%password.
The variable PASSWD may contain the password of the person using the
client. This information is used only if the protocol level is high
enough to support session-level passwords.
The variable PASSWD_FILE may contain the pathname of a file to read the
password from. A single line of input is read and used as the password.
NOTES
This command may be used only by root.
CONFIGURATION
The primary mechanism for making configuration changes and for reading
debug information for the cifs vfs is via the Linux /proc filesystem.
In the directory /proc/fs/cifs are various configuration files and
pseudo files which can display debug information. For more information
see the kernel file fs/cifs/README
BUGS
Passwords and other options containing , can not be handled. For pass‐
words an alternative way of passing them is in a credentials file or in
the PASSWD environment.
The credentials file does not handle usernames or passwords with lead‐
ing space.
Note that the typical response to a bug report is suggestion to try the
latest version first. So please try doing that first, and always
include which versions you use of relevant software when reporting bugs
(minimum: samba, kernel, distribution)
VERSION
This man page is correct for version 3.0 of the Samba suite.
SEE ALSO
Documentation/filesystems/cifs.txt and fs/cifs/README in the linux ker‐
nel source tree may contain additional options and information.
AUTHOR
Steve French
The syntax and manpage were loosely based on that of smbmount. It was
converted to Docbook/XML by Jelmer Vernooij.
The current maintainer of the Linux cifs vfs and the userspace tool
mount.cifs is Steve French. The SAMBA Mailing list is the preferred
place to ask questions regarding these programs.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬─────────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────────────────────┤
│Availability │ SUNWsmbar, SUNWsmbac, SUNWsmbau │
├────────────────────┼─────────────────────────────────┤
│Interface Stability │ External │
└────────────────────┴─────────────────────────────────┘
NOTES
Source for Samba is available in the SUNWsmbaS package.
MOUNT.CIFS(8)
