Samsung Behold 2 :: Understanding File Permissions?

Understanding Android file permissions

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To Check Permission at anytime in ADB just Type:

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The next 9 characters define the file permissions. These permissions are given in groups of 3 each.

The first 3 characters are the permissions for the owner of the file or directory.
Example = -rwx------

The next 3 are permissions for the group that the file is owned by.
Example = ----rwx---

The final 3 characters define the access permissions for everyone not part of the group.
Example = -------rwx

There are 3 possible attributes that make up file access permissions.

r - Read permission. Whether the file may be read. In the case of a directory, this would mean the ability to list the contents of the directory.

w - Write permission. Whether the file may be written to or modified. For a directory, this defines whether you can make any changes to the contents of the directory. If write permission is not set then you will not be able to delete, rename or create a file.

x - Execute permission. Whether the file may be executed. In the case of a directory, this attribute decides whether you have permission to enter, run a search through that directory or execute some program from that directory

In addition to the file permission, you can also modify the owner and group of the file. The chown program is used here and its syntax is very simple. You need to be the owner of a file or root to do this.

Understanding Owner Permissions:
The first command is for owner ID, the Second Command is for Group ID.
exp. root.root ( First Root is owner, Second Root is Group ).

Chmod 644 some file, Like Build.prop For testing & then Veiw the Resulted Changes!
Refer to the table below as a quick reference.

Command Line for Both would look like this

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I'll update the chmod with more with More Complex Commands Later

Side Note:Always set owner ( chown ) before Setting Permissions