free-displays amount of free and used memory in the system

free ”displays amount of free and used memory in the system

 free [-b  -k  -m] [-o] [-s delay ] [-t] [-V] 

free displays the total amount of free and used physical and swap memory in the system, as well as the shared memory and buffers used by the kernel.

Example A.30.

 %  free   total       used       free     shared   buffers  cached   Mem:       64148      54528       9620      45632   3460     29056   -/+ buffers/cache:    22012      42136   Swap:      96352          0      96352