![]() As an example, if we wanted to set 777 (read, write, execute) permissions on a file named picture1.png, then we’d type the following command: Replace the XXX in the above command with the 3 group permissions that you calculated, and then replace filename with the file name or folder name that you wish to set permissions on. First, navigate to the folder containing the files or folders where you will be applying the permissions (by using the change directory command). Once you have calculated the permission for each group using the method above, it’s time to apply them to a particular file. In the next section, we’ll see how permissions are represented in the OS, as well as how they are calculated. On Unix-based systems (which, if you're not familiar, is what OS X is based on), file permissions can be applied to three groups of people: User, Group, and Word (i.e., you can give read, write, or executable permissions to any of the logins in a user group). ![]() You can set permissions on any file or folder on your computer, and there are three diferent modes: read, write, and execute. ![]() Read on to learn all about file permissions and how you can change them through the command line. Using an administrator account and the chmod command, you can “change the mode” of files and folders, which will allow other uers to read, write, or execute certain files. Occasionally, you may need to give someone access to these particular files, and that’s when knowing how to use this tool could come in handy. File permissions are important to utilize on a computer with more than one login because they keep certain user from accessing files or folders with sensitive information.
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