ubuntu Mem 怎么不是4G? - Linux

root@yun-desktop:~# uname -a
Linux yun-desktop 3.2.0-34-generic #53-Ubuntu SMP Thu Nov 15 10:48:16 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

root@yun-desktop:~# free -m
total used free shared buffers cached
Mem: 3190 2925 265 0 51 1065
-/+ buffers/cache: 1808 1381
Swap: 3813 193 3620

root@yun-desktop:~# dmidecode|grep -P -A5 "Memory\s+Device"|grep Size|grep -v Range
Size: 2048 MB
Size: No Module Installed
Size: 2048 MB
Size: No Module Installed

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