NAME

mount, umount − mount and dismount file system

SYNOPSIS

/etc/mount [ special directory [ −r ] ]

/etc/umount special

DESCRIPTION

Mount announces to the system that a removable file system is present on the device special. The directory must exist already; it becomes the name of the root of the newly mounted file system. 

These commands maintain a table of mounted devices.  If invoked with no arguments, mount prints the table. 

The optional last argument indicates that the file is to be mounted read-only.  Physically write-protected and magnetic tape file systems must be mounted in this way or errors will occur when access times are updated, whether or not any explicit write is attempted. 

Umount announces to the system that the removable file system previously mounted on device special is to be removed. 

FILES

/etc/mnttabmount table

SEE ALSO

mount(2), mnttab(5). 

DIAGNOSTICS

Mount issues a warning if the file system to be mounted is currently mounted under another name. 

Umount complains if the special file is not mounted or if it is busy.  The file system is busy if it contains an open file or some user’s working directory. 

BUGS

Some degree of validation is done on the file system, however it is generally unwise to mount garbage file systems. 

May 16, 1980