V4/man/man8/mount.8

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.th MOUNT VIII  10/31/73
.sh NAME
mount \*- mount file system
.sh SYNOPSIS
.bd /etc/mount
special file
.sh DESCRIPTION
.it Mount
announces to the system that a removable file system
is present on the device corresponding to special
file
.it special
(which must refer to a disk or possibly DECtape).
The
.it file
must exist already; it
becomes the name of the root of the newly mounted
file system.
.sh "SEE ALSO"
umount (VIII)
.sh BUGS
Mounting file systems full of garbage can crash the system.