令人疑惑的 du 输出: byte, KB, MB 的换算关系?

引用:

-(dearvoid@LinuxEden:Forum)-(~/tmp)-
[$$=8146 $?=0] ; ls -l file
-rw-r--r-- 1 root root 1048576 2008-06-30 12:42 file
-(dearvoid@LinuxEden:Forum)-(~/tmp)-
[$$=8146 $?=0] ; ls -lh file
-rw-r--r-- 1 root root 1.0M 2008-06-30 12:42 file
-(dearvoid@LinuxEden:Forum)-(~/tmp)-
[$$=8146 $?=0] ; du -b file
1048576    file  <---- 1024 * 1024 * 1024
-(dearvoid@LinuxEden:Forum)-(~/tmp)-
[$$=8146 $?=0] ; du -k file
1028       file    <--- 怎么不是 1024
-(dearvoid@LinuxEden:Forum)-(~/tmp)-
[$$=8146 $?=0] ; du -m file
2  file    <--- why 2?
-(dearvoid@LinuxEden:Forum)-(~/tmp)-
[$$=8146 $?=0] ; du -h file
1.1M       file    <--- 1M 才对啊?
-(dearvoid@LinuxEden:Forum)-(~/tmp)-
[$$=8146 $?=0] ; bye