Display memory statistics in Linux:

# cat /proc/meminfo

MemTotal:        8174584 kB
MemFree:         6716912 kB
Buffers:           48924 kB
Cached:          1132616 kB
SwapCached:            0 kB
Active:           371336 kB
Inactive:         994280 kB
Active(anon):     235716 kB
Inactive(anon):        0 kB
Active(file):     135620 kB
Inactive(file):   994280 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:       2104504 kB
SwapFree:        2104504 kB
Dirty:               620 kB
Writeback:             0 kB
AnonPages:        184060 kB
Mapped:            36244 kB
Slab:              52252 kB
SReclaimable:      39408 kB
SUnreclaim:        12844 kB
PageTables:         2632 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     6191796 kB
Committed_AS:     390700 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      102796 kB
VmallocChunk:   34359615995 kB
DirectMap4k:       21376 kB
DirectMap2M:     8366080 kB