1mount_tmpfs(1M) System Administration Commands mount_tmpfs(1M)
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6 mount_tmpfs - mount tmpfs file systems
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9 mount [-F tmpfs] [-o specific_options] [-O] special mount_point
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13 tmpfs is a memory based file system which uses kernel resources relat‐
14 ing to the VM system and page cache as a file system.
15 mount attaches a tmpfs file system to the file system hierarchy at the
18 pathname location mount_point, which must already exist. If mount_point
19 has any contents prior to the mount operation, these remain hidden
20 until the file system is once again unmounted. The attributes (mode,
21 owner, and group) of the root of the tmpfs filesystem are inherited
22 from the underlying mount_point, provided that those attributes are
23 determinable. If not, the root's attributes are set to their default
24 values.
25 The special argument is usually specified as swap but is in fact disre‐
28 garded and assumed to be the virtual memory resources within the sys‐
29 tem.
30
32 -o specific_options Specify tmpfs file system specific options in a
33 comma-separated list with no intervening spaces.
34 If invalid options are specified, a warning
35 message is printed and the invalid options are
36 ignored. The following options are available:
37 size=sz The sz argument controls the
39 size of this particular tmpfs
40 file system. If the argument
41 is has a `k' suffix, the num‐
42 ber will be interpreted as a
43 number of kilobytes. An `m'
44 suffix will be interpreted as
45 a number of megabytes. No
46 suffix is interpreted as
47 bytes. In all cases, the
48 actual size of the file sys‐
49 tem is the number of bytes
50 specified, rounded up to the
51 physical pagesize of the sys‐
52 tem.
53 xattr | noxattr Allow or disallow the cre‐
56 ation and manipulation of
57 extended attributes. The
58 default is xattr. See
59 fsattr(5) for a description
60 of extended attributes.
61 -O Overlay mount. Allow the file system to be
65 mounted over an existing mount point, making the
66 underlying file system inaccessible. If a mount
67 is attempted on a pre-existing mount point with‐
68 out setting this flag, the mount will fail, pro‐
69 ducing the errordevice busy.
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73 /etc/mnttab Table of mounted file systems
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77 See attributes(5) for descriptions of the following attributes:
78 ┌─────────────────────────────┬─────────────────────────────┐
83 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
84 ├─────────────────────────────┼─────────────────────────────┤
85 │Availability │SUNWcsu │
86 └─────────────────────────────┴─────────────────────────────┘
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89 mount(1M), mkdir(2), mount(2), open(2), umount(2), mnttab(4),
90 attributes(5), fsattr(5), tmpfs(7FS)
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93 If the directory on which a file system is to be mounted is a symbolic
94 link, the file system is mounted on the directory to which the symbolic
95 link refers, rather than on top of the symbolic link itself.
96SunOS 5.11 24 Nov 2003 mount_tmpfs(1M)