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Manual

FADVISE

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXIT STATUS
AUTHORS
SEE ALSO
REPORTING BUGS
AVAILABILITY

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/>.