NAME
    free - display information about free and used memory on the system

SYNOPSIS
    free [-b|-k|-m|-g] [-l] [-o] [-t] [-s delay ] [-c count ]

DESCRIPTION
    free(1) displays the total amount of free and used physical memory and
    swap space in the system, as well as the buffers and cache consumed by
    the kernel.

OPTIONS
    Normal invocation of free(1) does not require any options. The output,
    however, can be fine-tuned by specifying one or more of the following
    flags:

    -b, --bytes
    Display output in bytes.

    -k, --kb
    Display output in kilobytes (KB).  This is the default.

    -m, --mb
    Display output in megabytes (MB).

    -g, --gb
    Display output in gigabytes (GB).

    -l, --lowhigh
    Display detailed information about low vs. high memory usage.

    -o, --old
    Use old format. Specifically, do not display -/+ buffers/cache.

    -t, --total
    Display total summary for physical memory + swap space.

    -c n, --count=n
    Display statistics n times, then exit. Used in conjunction with
    the -s flag.  Default is to display only once, unless -s was
    specified, in which case default is to repeat until interrupted.

    -s n, --repeat=n
    Repeat, pausing every n seconds in-between.

    -V, --version
    Display version information and exit.

    --help Display usage information and exit

FILES
    /proc/meminfo -- memory information

SEE ALSO
   ps(1),top(1), vmstat(1)

AUTHORS
    Written by Robert Love.

    The procps package is maintained by Rik van Riel and Robert Love and
    was created by Michael Johnson.

    Send bug reports to <procps-list@redhat.com>.