Linux inode

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空间没有用完，但是无法创建文件或者文件夹原因：inode已经被用完
查看inode使用情况：df -iP
设置inode的总数：在格式化分区（mkfs）时加入参数
 
cp operation: allocate a free inode number
mv operation: no create new inode number, only change time stamp
rm operation: release the inode number to be reuse. rm will not remove file. only will be overwrite. 

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