리눅스 메모리 사용량 확인 명령어 free 매뉴얼
- Operating System
- 2010. 1. 12.
리눅스 메모리 사용량 확인 명령어 free 매뉴얼
현업에서는
free -m -t
이렇게 많이들 사용합니다.
[root@DIM ~]# free --help
free: invalid option -- -
usage: free [-b|-k|-m|-g] [-l] [-o] [-t] [-s delay] [-c count] [-V]
-b,-k,-m,-g show output in bytes, KB, MB, or GB
-l show detailed low and high memory statistics
-o use old format (no -/+buffers/cache line)
-t display total for RAM + swap
-s update every [delay] seconds
-c update [count] times
-V display version information and exit
[root@DIM ~]# man free
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] [-o] [-s delay ] [-t] [-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 The shared memory column should be ignored; it is obsolete.
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 -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 sub-
tracts 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 resolution delay times.
The -V 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@users.sf.net>
Cohesive Systems 20 Mar 1993 FREE(1)
[root@DIM ~]#
[root@DIM ~]#
[root@DIM ~]# free -m -t
total used free shared buffers cached
Mem: 3546 779 2766 0 133 279
-/+ buffers/cache: 366 3179
Swap: 0 0 0
Total: 3546 779 2766
[root@DIM ~]#