UMOUNT(8) BSD System Manager's Manual UMOUNT(8)NAMEumount — unmount filesystems
SYNOPSISumount [-fv] special | node
umount-a | -A [-F fstab] [-fv] [-h host] [-t type]
DESCRIPTION
The umount command calls the unmount(2) system call to remove a special
device or the remote node (rhost:path) from the filesystem tree at the
point node. If either special or node are not provided, the appropriate
information is taken from the fstab(5) file.
The options are as follows:
-a All the filesystems described in fstab(5) are unmounted.
-A All the currently mounted filesystems except the root are
unmounted.
-F fstab
Specify the fstab file to use.
-f The filesystem is forcibly unmounted. Active special devices
continue to work, but all other files return errors if further
accesses are attempted. The root filesystem cannot be forcibly
unmounted.
-h host
Only filesystems mounted from the specified host will be
unmounted. This option implies the -A option and, unless other‐
wise specified with the -t option, will only unmount NFS filesys‐
tems.
-t type
Is used to indicate the actions should only be taken on filesys‐
tems of the specified type. More than one type may be specified
in a comma separated list. The list of filesystem types can be
prefixed with “no” to specify the filesystem types for which
action should not be taken. For example, the umount command:
umount-a -t nfs,mfs
unmounts all filesystems of the type NFS and MFS that are listed
in the fstab(5) file.
-v Verbose, additional information is printed out as each filesystem
is unmounted.
ENVIRONMENT
PATH_FSTAB If the environment variable PATH_FSTAB is set all operations
are performed against the specified file.
FILES
/etc/fstab filesystem table
SEE ALSOunmount(2), fstab(5), mount(8)HISTORY
A umount command appeared in Version 6 AT&T UNIX.
BSD May 8, 1995 BSD
