check memory di linux

_____ free -m 
_____ free -h
_____ free -b
_____ sensors # Memantau suhu / temparatur CPU

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.

root@samuderapase:~# free -t
total used free shared buffers cached
Mem: 762892 713272 49620 0 11708 298504
-/+ buffers/cache: 403060 359832
Swap: 1951736 15752 1935984
Total: 2714628 729024 1985604
root@samuderapase:~# sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +53.0°C (crit = +86.0°C)
temp2: +46.0°C (crit = +96.0°C)

root@samuderapase:~# vmstat
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 16768 37272 11656 287496 0 2 74 24 104 266 2 1 94 3

ket:

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.