[jboss@hostname ~]$ free -gt
total used free shared buffers cached
Mem: 45 44 0 0 1 29
-/+ buffers/cache: 14 30
Swap: 9 0 9
1. ¸Þ¸ð¸® ³²Àº ¿ë·® = free + buffers + cached = µÎ¹ø°ÁÙ cache ¿Í °°À½
2. ¸Þ¸ð¸® »ç¿ë Áß ¿ë·® = total - ³²Àº¿ë·® = µÎ¹ø°ÁÙ buffers