1. [root@dce-10-29-0-255 ~]# cat /proc/meminfo  |egrep -i 'buffers|cached|active\(file\)|shmem'
    2. Buffers:            2744 kB
    3. Cached:          9566148 kB
    4. SwapCached:            0 kB
    5. Active(file):    2590724 kB
    6. Inactive(file):  6381380 kB
    7. Shmem:            596788 kB
    8. [root@dce-10-29-0-255 ~]# expr 2744 + 9566148
    9. 9568892
    10. [root@dce-10-29-0-255 ~]# expr 2590724 + 6381380 + 596788
    11. 9568892
    12. [root@dce-10-29-0-255 ~]# echo "Buffers + Cached  = Active(file) + Inactive(file) + Shmem"
    13. Buffers + Cached  = Active(file) + Inactive(file) + Shmem
    16. [root@dce-10-29-0-255 ~]# free && cat /proc/meminfo |grep -i 'buffers\|cached\|Sreclaimable'
    17.               total        used        free      shared  buff/cache   available
    18. Mem:       16247596     5559068      544208      596744    10144320     9753596
    19. Swap:             0           0           0
    20. Buffers:            2744 kB
    21. Cached:          9578952 kB
    22. SwapCached:            0 kB
    23. SReclaimable:     562624 kB
    24. [root@dce-10-29-0-255 ~]# expr  2744 + 9578952 + 562624
    25. 10144320
    26. [root@dce-10-29-0-255 ~]# buff/cache = Buffers + Cached + SReclaimable:
    28. SReclaimable 是指可被回收的内核内存。