Mac hardware uuid command line
UUID Command in Terminal?
Although the Frameworks item can also be helpful on occasion, the other important sections to browse when checking for causes of instability are Preference Panes and Startup Items. A lot of information is given in multiple places. The location listed above is normally the most useful, and most easily accessed.
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Skip to content Macs have a lot of different identity numbers, settings, and other key bits of information which you will need to access at some time or other. Share this: Like this: Like Loading Secondary navigation Search.
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Press Esc to cancel. Post to Cancel. Post was not sent - check your email addresses! These are required because the Java settings are stored in the "ByHost" preferences folder within each user account, which stores settings on a per-computer basis. Additionally, in situations where home folders are stored in a central server, the ByHost preference files will change depending on what computers are being used by that account.
Furthermore, the settings within the user's Java preferences file that enable or disable each runtime are nested deep in a tree of parameters, making it impossible to use the more common "defaults" command to target them and instead require the use of "PlistBuddy" in a manner similar to the following thanks to Jaharmi's Irreality for the ioreg component:.
In this command, we're using the PlistBuddy program and are commanding it to target the nested JVMEnabled variable for the first runtime listed in the user's Java preferences, and then set it to be disabled. If you change the "USERNAME" text in the command to be the short name of the target user, then it will disable the first Java runtime for that user; however, even though this command will work in some situations, it will not work in all. For systems prior to OS X These differences mean that should you choose to tackle this with a command-line approach, then you would need to research what unique identifier is used, and how to extract it for use in the command.
In addition, you would need to rerun the command and change the first zero in it to a 1, and then a 2, and so on, in order to target other Java runtimes on the system.
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After this is done, then you would need to repeat this option for all users on the system. While some people may be able to use this approach for scripting a means of disabling Java for all accounts on all of their computers, this demonstrates that if you need to disable Java, then for most people the only feasible ways will be to do so within each user account using the Java Preferences utility, or by uninstalling Java itself.
Uninstalling Java While Java is a core aspect of older versions of OS X, you can essentially uninstall it on systems that do not need to use it by removing critical components of the Java framework and runtime that allow it to function. The framework and its components are only used for the purposes of running Java, so if you have determined that you do not want any users on the system to run Java, then you can take a few simple steps to remove it from the system.
For people who wish to disable Java on multiple machines that are used by many different users, this is likely the most practical approach. Uninstalling via the command line If you manage multiple systems and would like to break the Java runtime for them, then doing so is far easier than managing the Java preferences on a per-user and per-machine basis.
Since the removal of the Java runtime is the only needed step to break Java, you can do so by running the following command when logged into the system:. This command will delete all of the Java virtual machines that contain the necessary tools, libraries, and other resources necessary for running Java applications. With this component removed, if you need to run Java programs again you can download and apply any of the Java updates from the Apple Web site be sure to grab the latest one for your system , which should contain the necessary and applicable Java runtimes.
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While this command deletes the Java runtimes from the system, an alternative approach is to simply rename, archive, or move the Java runtime files so the resources that link to them will be broken. There are various approaches to doing this, such as the following, which should move them to the system library root and thereby prevent them from being used:.
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