UMOUNT

Section: Maintenance Commands (8)
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BSD mandoc
BSD 4  

NAME

umount - unmount filesystems  

SYNOPSIS

umount [-fv ] special | node
umount -a | A [-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
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 is implies the -A option and, unless otherwise specified with the -t option, will only unmount NFS filesystems.
-t type
Is used to indicate the actions should only be taken on filesystems 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

umounts all filesystems of the type NFS and MFS

-v
Verbose, additional information is printed out as each filesystem is unmounted.

 

FILES

/etc/fstab
filesystem table

 

SEE ALSO

unmount(2), fstab(5), mount(8)  

HISTORY

A umount command appeared in AT&T System v6 .


 

Index

NAME
SYNOPSIS
DESCRIPTION
FILES
SEE ALSO
HISTORY

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Time: 04:30:10 GMT, April 24, 2025