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sweta · #1 (**permalink**) 14-05-2008, 01:55 AM

To check avilable memory in Linux type free -m command. 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.

Code:

free -m
free -h
free -b

Output:

Code:

             total       used       free     shared    buffers     cached
Mem:          2025       1961         64          0        172       1035
-/+ buffers/cache:        753       1272
Swap:         1906          0       1906

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.

Code:

vmstat

Output:

Code:

procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 0  0      0  63316 176624 1062340    0    0    25    18   39  592  5  1 94  0

swpd: the amount of virtual memory used.
free: the amount of idle memory.
buff: the amount of memory used as buffers.
cache: the amount of memory used as cache.

RamPD · #2 (**permalink**) 20-05-2008, 07:52 PM

Hi sweta,
When i put command
free -h (as you have describerd here)
Give no results the output is invalid option.
Is there any errore.

R@hul · #3 (**permalink**) 03-07-2008, 11:12 AM

df -h

it will show available memory space

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