Manpages - fadvise.1

fadvise - utility to use the posix_fadvise system call

fadvise [*-a* advice/] [*-o* /offset/] [*-l* /length/] /filename

fadvise [*-a* advice/] [*-o* /offset/] [*-l* /length/] -d /file-descriptor

fadvise is a simple command wrapping posix_fadvise system call that is for predeclaring an access pattern for file data.

-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.

fadvise has the following exit status values:

0

success

1

unspecified failure

*posix_fadvise*(2)

For bug reports, use the issue tracker at <https://github.com/util-linux/util-linux/issues>.

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/>.