Manual Reference Pages  - FREE (1)

NAME

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

CONTENTS

Synopsis
Description
Options
Files
Authors

SYNOPSIS

free [options]

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 The shared memory column should be ignored; it is obsolete.

OPTIONS

-b, --bytes
  Display the amount of memory in bytes.
-k, --kilo Display the amount of memory in kilobytes. This is the default.
-m, --mega Display the amount of memory in megabytes.
-g, --giga Display the amount of memory in gigabytes.
--tera Display the amount of memory in terabytes.
-h, --human
  Show all output fields automatically scaled to shortest three digit unit and display the units of print out. Following units are used.

  B = bytes
  K = kilos
  M = megas
  G = gigas
  T = teras

If unit is missing, and you have petabyte of RAM or swap, the number is in terabytes and columns might not be aligned with header.

-c, --count count
  Display the result count times. Requires the -s option.
-l, --lohi Show detailed low and high memory statistics.
-o, --old Display the output in old format, the only difference being this option will disable the display of the "buffer adjusted" line.
-s, --seconds seconds
  Continuously display the result delay seconds apart. You may actually specify any floating point number for delay, usleep(3) is used for microsecond resolution delay times.
--si Use power of 1000 not 1024.
-t, --total
  Display a line showing the column totals.
--help Print help.
-V, --version
  Display version information.

FILES

/proc/meminfo
  memory information

SEE ALSO

ps(1), slabtop(1), top(1), vmstat(8).

AUTHORS

Written by Brian Edmonds.

REPORTING BUGS

Please send bug reports to


procps-ng FREE (1) September 2011
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