How do I find out ram information under Linux operating systems?
You can use the following commands to find information about RAM under Linux operating systems.
Find Used and Free RAM Info Command
You need to use the free command:
# free
# free -m
total used free shared buffers cached
Mem: 7930 4103 3826 0 59 2060
-/+ buffers/cache: 1983 5946
Swap: 15487 0 15487
Find Out Ram Speed, Make, Form Factor, Type and Other Information
You need to use the dmidecode command:
# dmidecode --type 17
OR
# dmidecode --type memory
OR
# dmidecode -t 17
Sample outputs:
# dmidecode 2.11 SMBIOS 2.5 present. Handle 0x0017, DMI type 17, 27 bytes Memory Device Array Handle: 0x0016 Error Information Handle: No Error Total Width: 72 bits Data Width: 64 bits Size: 2048 MB Form Factor: DIMM Set: 1 Locator: DIMM1A Bank Locator: Bank1 Type: DDR2 Type Detail: Synchronous Speed: 667 MHz Manufacturer: 5185 Serial Number: 05009F22 Asset Tag: Not Specified Part Number: 72T232220HFA3SB
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{ 7 comments… read them below or add one }
free -m
dmidecode
Hi,
probably just a typo, it should be:
# dmidecode –type 17
Thanks for very informative site,
Paul
Thanks for the heads up! The faq has been updated.
htop
is also a good command if you like a graphical display of RAM
Good , i like htop.
less /proc/meminfo will give you detailed information on your systems memory. This is where all other utilities are pulling the information from.
If dmidecode pulls RAM info from /proc/meminfo then it’s using some super-dodecahedral secret decoder ring because “speed” and “type” aren’t there in “cat /proc/meminfo”.