umount –a –t cifs,nfs

Name

umount

Synopsis

umount [options] [directory]

System administration command. Unmount filesystem specified by directory. You may also specify the filesystem by device name. umount announces to the system that the removable file structure previously mounted on the specified directory is to be removed. Any pending I/O for the filesystem is completed, and the file structure is flagged as clean. A busy filesystem cannot be unmounted.

Options

      -a

Unmount all filesystems listed in /etc/mtab other than /proc.

-t type

Unmount only filesystems of type type. Multiple types can be specified as a comma-separated list, and any type can be prefixed with no to specify that filesystems of that type should not be unmounted.

Overview of NFS

The Network File System (NFS) is a distributed filesystem that allows users to mount remote filesystems as if they were local. NFS uses a client/server model in which a server exports directories to be shared and clients mount the directories to access the files in them. NFS eliminates the need to keep copies of files on several machines by letting the clients all share a single copy of a file on the server. NFS is an RPC-based application-level protocol.

The Common Internet File System (CIFS) is an accepted standard for file sharing across the domain, but also across the internet. It is an advanced version of SMB and has been in operation since Windows 2000 server.