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Unix

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Accessing network assets are vital to a user’s ability to perform their daily work activity such as sending e-mail and other documents. A major portion of sending e-mail often includes sending files, which need to be uploaded or downloaded once they have been sent out. In order for either of both of those processes to be carried out a user must have permission or authorization to access the file.

A user(s) access is dependent upon the Access Control List (ACL) they are on which is a set of rules or guidelines which sets the permission level and access a user will have to network assets. UNIX systems are typically based on the file access control schema, which is designed to assign a User Identification number or User ID, which is unique to the individual user. The same goes for a group of users as well but instead of a single user the users are under the Group ID umbrella, which lists all individual users and designates their permissions within the group. A user can have a different set of access within their single user permission opposed to their group permissions.

Files are typically secured within UNIX file permissions and through ACLs. Other types of files such as those with sticky bits, and files that are executable require additional special security measures to be implemented in order for users to access them. Traditional UNIX file permissions are classified by ownership using three classes of users: users, groups and others. The owner of the file can usually has the ability to assign or modify file permissions. The root account can also change a file's ownership. All of the permissions are carried out by command line input by the user who owns the file and they are in charge of giving the group access. Read, write, execute and deny.

For example if a UNIX Administrator had 5,000 users and wanted 4,990 to access one file

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