mount(8)mount(8)Name
mount, umount - mount or unmount file systems
Syntax
/etc/mount [ options ] [ device ] [ directory ]
/etc/umount [ options ] [ device ] [ directory ]
Description
This is a general description of the command. Additional descriptions
are provided to define the syntax and options for the NFS and UFS file
systems.
Each invocation of the command announces to the system that a file sys‐
tem is present on the device device. The file system may be local or
remote. File directory must exist as a directory file. It becomes the
name of the newly mounted file system root.
If invoked without arguments, prints the list of mounted file systems.
Physically write-protected disks and magnetic tape file systems must be
mounted read-only or an error will occur at mount time.
General users can only mount file systems with certain restrictions.
For example, the user, other than the superuser, performing the mount
must own the directory directory. Furthermore, no users other than the
superuser can execute or programs on the mounted file systems. In
addition, users other than the superuser cannot access block or special
character devices such as on the mounted file systems.
The command announces to the system that the removable file system pre‐
viously mounted on the specified directory is to be removed. Only the
person who mounted a particular file system or the superuser can
unmount the file system again.
Options-a Reads the file and mounts, or unmounts, all file systems
listed there.
-f Fast unmount. The option has no meaning for local file
systems and directories. However, for remote file system
types (such as NFS), the option causes the client to
unmount the remotely mounted file systems and directories
without notifying the server. This can avoid the delay of
waiting for acknowledgment from a server that is down.
-o options Specifies a string that is passed to the kernel and used by
the specific file system's mount routine in the kernel.
For specific options, refer to the file system-specific
description, such as
-r Indicates that the file system is to be mounted read only.
To share a disk, each host must mount the file system with
the -r option.
-t type Specifies the type of file system is being mounted. When
used with the option, the option mounts all file systems of
the given type found in the file. For specific file system
types, refer to the file system-specific description, such
as
-v Tells what did or did not happen. (Verbose flag)
The options for are:
-a Unmounts all mounted file systems. It may be necessary to
execute twice to accomplish unmounting of all mounted file
systems.
-v Tells what did or did not happen. (Verbose flag)
Restrictions
Mounting corrupted file systems will crash the system.
Files
File systems information table
See Alsogetmnt(2), mount(2), fstab(5), fsck(8), mount(8nfs), mount(8ufs)mount(8)
