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 2.41.2		  2025-09-22			    FADVISE(1)