free命令和proc/meminfo都可以查看
chechunli@chechunli-desktop:~ $ free
total used free shared buffers cached
Mem: 2009500 1452528 556972 0 740852 269356
-/+ buffers/cache: 442320 1567180
Swap: 1951888 0 1951888
chechunli@chechunli-desktop:~ $ cat /proc/meminfo
MemTotal: 2009500 kB
MemFree: 557064 kB
Buffers: 740860 kB
Cached: 269356 kB
SwapCached: 0 kB
Active: 584108 kB
Inactive: 704428 kB
HighTotal: 1112896 kB
HighFree: 548588 kB
LowTotal: 896604 kB
LowFree: 8476 kB
SwapTotal: 1951888 kB
SwapFree: 1951888 kB
Dirty: 520 kB
Writeback: 0 kB
AnonPages: 278444 kB
Mapped: 99016 kB
Slab: 134024 kB
SReclaimable: 112788 kB
SUnreclaim: 21236 kB
PageTables: 3240 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 2956636 kB
Committed_AS: 1432980 kB
VmallocTotal: 114680 kB
VmallocUsed: 50360 kB
VmallocChunk: 62452 kB
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