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FREE(1)                       Linux User's Manual                      FREE(1)



NAME
       free - Display amount of free and used memory in the system

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

DESCRIPTION
       free  displays  the  total  amount of free and used physical and swap memory in the
       system, as well as the buffers used by the kernel.  The shared memory column repre-
       sents the 'Shmem' value.  The available memory column represents the 'MemAvailable'
       value.

   Options
       The -b switch displays the amount of  memory  in  bytes;  the  -k  switch  (set  by
       default)  displays  it in kilobytes; the -m switch displays it in megabytes; the -g
       switch displays it in gigabytes.

       The -h switch displays all output  fields  automatically  scaled  to  the  shortest
       (three  digit) representation including the unit. That makes the values human read-
       able.

       The -t switch displays a line containing the totals.

       The -o switch disables the display of a "buffer adjusted" line.  If the  -o  option
       is  not specified, free subtracts buffer memory from the used memory and adds it to
       the free memory reported.

       The -s switch activates continuous polling delay seconds apart.  You  may  actually
       specify any floating point number for delay, usleep(3) is used for microsecond res-
       olution delay times.

       The -c switch used together with the -s switch interrupts the polling  after  count
       repetitions.

       The -l switch shows detailed low and high memory statistics.

       The  -a  switch  shows the available memory (if supported by the running kernel and
       enabled with sysctl -w vm.meminfo_legacy_layout=0 ; shows zero when unsupported  or
       disabled). The produced output is wider than 80 characters.

       The -V switch displays version information.

FILES
       /proc/meminfo-- memory information


SEE ALSO
       ps(1), slabtop(1), vmstat(8), top(1)


AUTHORS
       Written by Brian Edmonds.

       Send bug reports to <albert AT users.net>




Cohesive Systems                 20 Mar 1993                           FREE(1)

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