man > FADVISE(1)

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 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:

       0
           success

       1
           unspecified failure

AUTHORS
       Masatake YAMATO <yamato AT redhat.com>

SEE ALSO
       posix_fadvise(2)

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/>.

util-linux 2.39.3                            2023-11-21                                   FADVISE(1)