free
Display amount of free and used memory in the system
see also :
ps - slabtop - top - vmstat
Synopsis
free
[options]
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examples
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 The shared memory column should be ignored; it is
obsolete.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.
-V,
--version
Display version
information.
files
/proc/meminfo
memory information
reporting bugs
Please send bug reports to procps[:at:]freelists[:dot:]org
(procps[:at:]freelists[:dot:]org)
see also
ps ,
slabtop , top , vmstat .
authors
Written by
Brian Edmonds.