How to Write a Permission Vs. Modify a Permission
In the IT world, a permission is the authority to change a file, a folder or a directory. If an individual who isn't authorized needs to change a file, someone in authority -- a root user or an administrator, for example -- will need to write a permission to authorize the individual to make changes. The permission may allow the individual to read a file, write a file or delete a file, depending on the authority he receives. In some cases, having written a permission, the administrator must later modify it.
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Instructions
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Write a Permission
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Identify what files the user should have a permission to work with. In Unix, for example, each file in the system has an owner. The owner has permission to write and modify the file, but other users can only read it.
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Make the permission as fine-grained as possible. A fine-grained permission gives the user no more authority than necessary, rather than a blanket permission to work on any file in the system. Some users might need wide-ranging authority, but others might only need to work on one file, or the files on a particular drive.
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Write the permission according to the rules of your system. If you're setting up an operating group or team to work on a project, you may be able to give several users on the team a permission at one time.
Modify a Permission
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Review the reasons the user's current permission isn't suitable. It may be that the user needs to clean up her work, which requires the authority to delete certain files. Alternatively, if she's no longer working in a particular group, it may be good security to restrict her ability to affect the files.
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Identify the folders or data that the revised permission will affect. If you're not going to change the user's permissions regarding other file folders, you should make sure not to take away any permissions he needs in his regular work.
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Make the changes according to the requirements in your system. In some forms of Windows, it's simply a matter of clicking on the folder, bringing up the Security tab and making the changes.
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