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Ls-l commands

Source: Internet
Author: User
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Several issues with the ls-l command-Linux general technology-Linux technology and application information. The following is a detailed description. For example:
Drwxr-xr-x 2 root 12288 Sep 15 10:12 sbin
12288 indicates the current directory size or the basic unit size occupied by the Directory. It seems that the default value for creating an empty directory is 4096, 12288, which is equal to 4096 and 3. What is the unit of this number, Byte? KB? MB?

For example:
-Rw-r -- 1 root 33385 Sep 11 install. log
What does permission 1 mean for a file? It is the number of nodes. How should I understand the number of file nodes?

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