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Man page of FADVISE
FADVISE
Section: User Commands (1)
Updated: 2026-06-16
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NAME
fadvise - utility to use the posix_fadvise system call
SYNOPSIS
fadvise [-a advice] [-o offset] [-l length] filename
fadvise [-a advice] [-o offset] [-l length] -d file-descriptor
DESCRIPTION
fadvise is a simple command wrapping posix_fadvise(2) system call
that is for predeclaring an access pattern for file data.
OPTIONS
-d, --fd file-descriptor
-
Apply the advice to the file specified with the file descriptor instead
of open a file specified with a file name.
-a, --advice advice
-
See the command output with --help option for available values for
advice. If this option is omitted, "dontneed" is used as default advice.
-o, --offset offset
-
Specifies the beginning offset of the range, in bytes.
If this option is omitted, 0 is used as default advice.
-l, --length length
-
Specifies the length of the range, in bytes.
If this option is omitted, 0 is used as default advice.
-h, --help
-
Display help text and exit.
-V, --version
-
Display version and exit.
EXIT STATUS
fadvise has the following exit status values:
0
-
success
1
-
unspecified failure
AUTHORS
SEE ALSO
posix_fadvise(2)
REPORTING BUGS
For bug reports, use the
issue tracker <https://github.com/util-linux/util-linux/issues>.
AVAILABILITY
The fadvise command is part of the util-linux package which can be downloaded from
Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- EXIT STATUS
-
- AUTHORS
-
- SEE ALSO
-
- REPORTING BUGS
-
- AVAILABILITY
-
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Time: 11:48:40 GMT, September 14, 2026