GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 2.1AS(Slurm) |
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umount(8) |
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umount − unmount file systems
umount [−hV]
umount -a
[−nrv] [−t vfstype] [−O
options]
umount [−nrv] device | dir
[...]
The umount command detaches the file system(s) mentioned from the file hierarchy. A file system is specified either by giving the directory where it has been mounted, or by giving the special device on which it lives.
Note that a file system cannot be unmounted when it is ’busy’ - for example, when there are open files on it, or when some process has its working directory there, or when a swap file on it is in use. The offending process could even be umount itself - it opens libc, and libc in its turn may open for example locale files.
Options for the umount command:
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−V |
Print version and exit. | ||
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−h |
Print help message and exit. | ||
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−v |
Verbose mode. | ||
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−n |
Unmount without writing in /etc/mtab. | ||
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−r |
In case unmounting fails, try to remount read-only. | ||
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−d |
In case the unmounted device was a loop device, also free this loop device. | ||
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−a |
All of the file systems described in /etc/mtab are unmounted. (With umount version 2.7 and later: the proc filesystem is not unmounted.) |
−t vfstype
Indicate that the actions should only be taken on file systems of the specified type. More than one type may be specified in a comma separated list. The list of file system types can be prefixed with no to specify the file system types on which no action should be taken.
−O options
Indicate that the actions should only be taken on file systems with the specified options in /etc/fstab. More than option type may be specified in a comma separated list. Each option can be prefixed with no to specify options for which no action should be taken.
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−f |
Force unmount (in case of an unreachable NFS system). (Requires kernel 2.1.116 or later.) |
The umount command will free the loop device (if any) associated with the mount, in case it finds the option ’loop=...’ in /etc/mtab, or when the −d option was given. Any pending loop devices can be freed using ’losetup -d’, see losetup(8).
/etc/mtab table of mounted file systems
umount(2), mount(8), losetup(8).
A umount command appeared in Version 6 AT&T UNIX.
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umount(8) | |