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
           Print 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 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 2.40.1                 2024-05-06                        FADVISE(1)