更多关于数字权限设置的内容：在任何区域中添加4，赋予了阅读权限；
More about numerical permissions settings: To add 4 in any of the fields grants read privileges;
上述例子中的目录，将权限设置为755，对于网络上可以使用的目录，这个权限非常常见，用户拥有所有的特权，而其他人只有阅读和执行的权限；
The directories in the example above have the permission set 755, which is common for web-available directories, in which the user has full privileges while others have read and execute only;
上述例子中的目录，将权限设置为755，对于网络上可以使用的目录，这个权限非常常见，用户拥有所有的特权，而其他人只有阅读和执行的权限；
The directories in the example above have the permission set 755, which is common for web-available directories, in which the user has full privileges while others have read and execute only;
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