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 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

Print version and exit.

EXIT STATUS

fadvise has the following exit status values:

success

unspecified failure

AUTHORS

Masatake YAMATO <yamato@redhat.com>

REPORTING BUGS

For bug reports, use the issue tracker at <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/>.