FADVISE(1) User Commands FADVISE(1)
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
Masatake YAMATO <yamato@redhat.com>
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/>.
util-linux 2.41 2025-02-26 FADVISE(1)
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