FINCORE(1)   <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>   FINCORE(1)

<?><?><?><?><?>
       fincore - <?><?><?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?> <?>
       <?><?><?><?><?><?>

<?><?><?><?>
       fincore [<?><?><?><?><?><?>] <?><?><?><?><?><?><?><?>...

<?><?><?><?>
       fincore counts pages of file contents being resident in memory (in
       core), and reports the numbers. If an error occurs during counting,
       then an error message is printed to the stderr and fincore continues
       processing the rest of files listed in a command line. fincore uses the
       cachestat(2) syscall to count resident pages. If the cachestat(2)
       syscall is not available and cachestat usage is not forced with the
       --cachestat option, then fincore uses the mincore(2) syscall as a
       fallback. The cachestat(2) syscall is more efficient than mincore
       because it does not require a page table lock to walks page tables, and
       also reports more information than mincore, like the number of cached
       pages, dirty pages, pages marked for writeback, evicted pages, and
       recently evicted pages. Another difference between the two syscalls is
       that if write permissions are not granted to the file, then
       cachestat(2) returns an error, while mincore(2) for security reasons,
       returns fake data as if all pages were resident in memory (c.f.r.
       kernel commit "make mincore() more conservative"
       <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=134fca9063ad4851de767d1768180e5dede9a881>).

       <?><?><?><?><?><?><?> <?><?><?><?><?> <?><?> <?><?><?><?><?><?><?><?>
       <?><?> <?><?><?><?><?><?>. <?><?><?><?> <?><?> <?><?><?> <?><?><?>
       <?><?> <?><?><?><?><?><?>, <?><?><?><?><?> <?><?>
       <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?> <?><?><?><?><?><?> <?> <?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?>. <?><?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?> --output
       <?><?><?><?><?><?>-<?><?><?><?><?><?> <?>
       <?><?><?><?><?><?><?><?><?><?> <?> <?><?><?><?><?><?> <?><?>
       <?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?> <?><?><?><?><?>.

<?><?><?><?><?><?>
       -n, --noheadings
           <?><?> <?><?><?><?><?><?><?><?> <?><?><?> <?><?><?><?><?><?><?><?>
           <?><?> <?><?><?><?><?><?> <?><?><?><?><?>.

       -b, --bytes
           Print sizes in bytes rather than in human-readable form.

           By default, sizes are shown in units that are powers of 1024 bytes.
           The formal abbreviations for these units (KiB, MiB, GiB, ...) are
           further shortened to just their first letter: K, M, G, ....

       -c, --total
           produce a grand total.

       -C, --cachestat
           force usage of the cachestat(2) syscall instead of mincore(2), and
           fail if it's not available.

       -o, --output <?><?><?><?><?><?>
           <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?> <?><?><?><?><?><?>.
           <?><?><?><?><?><?> <?><?><?><?><?> --help-<?> <?><?>
           <?><?><?><?><?><?><?><?> <?><?><?><?><?><?>
           <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?>
           <?><?><?><?><?><?>. <?><?><?><?><?><?><?> <?><?><?><?><?><?>
           <?><?><?><?><?><?> <?><?> <?><?><?><?> <?><?><?><?><?><?><?><?><?>
           <?><?><?> <?><?> <?><?><?><?><?><?> <?><?><?><?><?><?><?> <?>
           <?><?><?><?><?><?><?> +<?><?><?><?><?><?>.

       --output-all
           <?><?><?><?><?><?><?><?> <?><?><?> <?><?><?><?><?><?><?><?>
           <?><?><?><?><?><?>.

       -r, --raw
           <?><?><?><?><?><?><?><?><?> <?><?><?><?><?> <?>
           <?><?><?><?><?><?><?> <?><?><?><?><?><?><?>. <?><?><?>
           <?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?>
           <?><?><?><?><?><?><?> <?><?> <?><?><?><?>-<?><?><?><?><?><?><?><?>
           (\x<<?>o<?>>).

       -J, --json
           <?><?><?><?><?><?><?> <?><?><?><?> <?><?><?><?><?><?>
           <?><?><?><?><?><?>.

       -R, --recursive
           Recursively check all files in directories.

       -h, --help
           <?><?><?><?><?><?><?><?><?> <?><?><?><?><?> <?><?><?><?><?><?> <?>
           <?><?><?><?><?><?>.

       -V, --version
           <?><?><?><?><?><?><?><?> <?><?><?><?><?><?> <?> <?><?><?><?><?><?>.

<?><?><?><?><?><?><?><?>
       LIBSMARTCOLS_DEBUG=all
           <?><?><?><?><?><?><?><?> <?><?><?><?><?> ,,libsmartcols"
           <?><?><?><?><?><?><?><?><?><?><?><?>.

       LIBSMARTCOLS_DEBUG_PADDING=on
           <?><?><?><?><?><?><?> <?><?><?><?><?><?><?> <?><?><?><?><?><?><?>
           <?><?><?><?><?><?><?><?><?><?>.

<?><?><?><?><?><?>
       Masatake YAMATO <yamato@redhat.com>

<?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?>
       mincore(2), getpagesize(2), getconf(1p) cachestat(2)

<?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>
       <?><?> <?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>,
       <?><?><?><?><?><?><?><?><?>
       ,,https://github.com/util-linux/util-linux/issues[issue tracker]".

<?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> fincore <?><?> <?><?><?> ,,util-linux"
       <?><?><?><?><?><?> <?><?><?><?> <?><?> <?><?><?><?>
       <?><?><?><?><?><?><?><?> <?><?> <?><?><?><?><?><?> <?><?><?><?><?><?>
       <?><?><?><?><?><?><?>
       <https://www.kernel.org/pub/linux/utils/util-linux/>.

util-linux 2.42.1                 2026-05-18                        FINCORE(1)