MOUNT_TMPFS(1M)MOUNT_TMPFS(1M)NAMEmount_tmpfs - mount tmpfs file systems
SYNOPSIS
mount [-F tmpfs] [-o specific_options] [-O] special mount_point
DESCRIPTION
tmpfs is a memory based file system which uses kernel resources relat‐
ing to the VM system and page cache as a file system.
mount attaches a tmpfs file system to the file system hierarchy at the
pathname location mount_point, which must already exist. If mount_point
has any contents prior to the mount operation, these remain hidden
until the file system is once again unmounted. The attributes (mode,
owner, and group) of the root of the tmpfs filesystem are inherited
from the underlying mount_point, provided that those attributes are
determinable. If not, the root's attributes are set to their default
values.
The special argument is usually specified as swap but is in fact disre‐
garded and assumed to be the virtual memory resources within the sys‐
tem.
OPTIONS-o specific_options
Specify tmpfs file system specific options in a
comma-separated list with no intervening spaces.
If invalid options are specified, a warning
message is printed and the invalid options are
ignored. The following options are available:
remount
Remounts a file system with a
new size. A size not explic‐
itly set with remount reverts
to no limit.
size=sz
The sz argument controls the
size of this particular tmpfs
file system. If the argument
is has a `k' suffix, the num‐
ber will be interpreted as a
number of kilobytes. An `m'
suffix will be interpreted as
a number of megabytes. No
suffix is interpreted as
bytes. In all cases, the
actual size of the file sys‐
tem is the number of bytes
specified, rounded up to the
physical pagesize of the sys‐
tem.
xattr | noxattr
Allow or disallow the cre‐
ation and manipulation of
extended attributes. The
default is xattr. See
fsattr(5) for a description
of extended attributes.
-O
Overlay mount. Allow the file system to be
mounted over an existing mount point, making the
underlying file system inaccessible. If a mount
is attempted on a pre-existing mount point with‐
out setting this flag, the mount will fail, pro‐
ducing the errordevice busy.
FILES
/etc/mnttab
Table of mounted file systems
SEE ALSOmount(1M), mkdir(2), mount(2), open(2), umount(2), mnttab(4),
attributes(5), fsattr(5), tmpfs(7FS)NOTES
If the directory on which a file system is to be mounted is a symbolic
link, the file system is mounted on the directory to which the symbolic
link refers, rather than on top of the symbolic link itself.
Dec 2, 2011 MOUNT_TMPFS(1M)
