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????Android?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

Linux????

???????????????????Linux??????????????????????????????????????

1. Linux????????

Linux????????????????????????????????????????????????????????????????????????????????????????????????????ls????????????????drwxr-xr-x???????????????mac????????????????staff???root????????????????

2. Linux????

Linux????????????????????r??????4??w??????2??x???????1???????????????x?????????????x????????shell???????x??????????cd????????????????rwx??????????????????????????x???

3. ?????shell??

??????????????????chgrp????????chown????????chmod???????????????root???????????sudo???????chmod 777 test???test?????????rwx????????????????Linux????????

4. ?????FHS?

Filesystem Hierarchy Standard?FHS??Linux??????????????????????????????????/usr???????????/home???????/etc??????????FHS?????Linux???????????????????????

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????Linux????

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