RAM Size

Linux and Unix-Like Red Hat
1

Can anyone let me know whether there is a command to know the RAM capacity in GB?

I have tried cat /proc/meminfo and free.But its not in GB. I need to use it in script.

Thanks and Regards

3

Assuming cat /proc/meminfo prints

root:	total:    	used:    	free:  		shared:	buffers:	cached:
Mem:  	1055760384	1041887232	13873152	0	100417536 	711233536
Swap: 	1077501952  	8540160 	1068961792
						
MemTotal:		1031016 kB	
MemFree:		13548 kB
MemShared:		0 kB
Buffers:		98064 kB
Cached:			692320 kB
SwapCached:		2244 kB
Active:			563112 kB
Inact_dirty:		309584 kB
Inact_clean:		79508 kB
Inact_target:		190440 kB
HighTotal:		130992 kB
HighFree:		1876 kB
LowTotal:		900024 kB
LowFree:		11672 kB
SwapTotal:		1052248 kB
SwapFree:		1043908 kB
Committed_AS:		332340 kB

The values in the second and the third line of the above output are in Bytes.
If you want to calculate GB out from Bytes, the formula is like this: Bytes/1024/1024/1024

cat /proc/meminfo | awk '/^Mem:/ {print $2/1024/1024/1024"GB", $3/1024/1024/1024"GB", $4/1024/1024/1024"GB"}'
0,983253GB 0,970333GB 0,0129204GB
$

Also note that:

MemTotal:		1031016 kB

is the result of Bytes/1024

4

try this

 
# free -g
5

personally, I am partial to this command and I alias it to meminfo on all my machines:

vmstat -s -S M | egrep 'mem|swap'
6

#free -g
this command can list the RAM size and swap size in GB