CentOS 64???? 2G ???? ???????? 2G ??? ????
????????? ??? ??? ??? ??? ??? ?? ?? ? ? ????
?? 2G ???? ???? ? 1876?? ?? 2G ????? ??? ? ????. . ???? ??? ??? 3G? 1876??? ????? ??????
???? ??? 1024? ????? ???? ??? ?? ? ? ????. 1876? ??? ??? ? ????
??? 2?? ???? ??? ?????
1.cat /proc/meminfo |grep MemTotal
2.free -b
4G? ?? ??????(2G ??? ??? ????)
1.free -m
?:3852 MB
1.free -b
(??? ??????!)
??:4039471104 ???
2.cat /proc/meminfo |grep MemTotal
3944796 KB
3944796 kB*1024=4039471104???, ??? free -b? ????
4039471104??? / 1024=3944796KB / 1024=3852.33984375MB
??????. . ????? ??? ? 3?? ??? ???? ???? ??? ?? ? ? ????
?? ???. 2G ??????.
??????? 2GB?? ?? ??? ?????, 1GB? 1000^3???? ????
????? GB? ?? ???? ? ??? ?????(Gibibyte)??, ?? 1024^3???? ????.
??? ??? ???? ???? ????.
??? ??? ??? ????.
???(grep? ??? ?? ??? ?? ????. ?? CentOS 6???. ? ????? grep? ???? ?? ??? ???. ??? ????.)
free -m? ???? ??: free ??? ??? ?? /proc/meminfo?? ?? ???? /proc/meminfo? MemTotal? ??? ??? ????? ?? ??? ??? ??? ???? ?? ??? ? ????. ??? ?? ????? ??????.
?? -m
??? ??? ? ?? ?? ??
??: 488 424 64 54 22 205
-/+ ??/??: 196 292
??: 1999 0 1999
? ??? ?? Alibaba Cloud ??? ? ????, ?? ??? ??????? ????? 1024? 1000 ????? ??? ?? ????? ????. ?? ????? ???? ?????. ?? ???? ????? ??? ?? ???????.
2G? ???? ????
redhat?? ?? ???? ???? ?? dmidecode ??? ???? ???? ??? ? ? ????