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tlmgr-key:tldr:a7db9

tlmgr-key: Remove a specific key by its ID.

tlmgr

$ sudo tlmgr key remove ${key_id}

try on your machine

This command removes a GPG key from the TeX Live Package Manager (tlmgr) using the sudo privilege.

Here's a breakdown of the elements of the command:

sudo: It is a command used in Unix-like operating systems to execute a command with administrative privileges. By using "sudo" before a command, the user obtains temporary root or superuser access, allowing them to perform tasks that require administrative privileges.
tlmgr: It stands for TeX Live Package Manager. It is a utility used to manage packages in the TeX Live distribution, which is a widely-used typesetting system used primarily in academia and scientific fields.
key remove: It is the specific action being performed with tlmgr, which is removing a GPG key.
${key_id}: It is a placeholder for the actual key ID that needs to be removed. Key IDs are specific identifiers assigned to GPG keys, helping to locate and manage them. You need to replace ${key_id} with the actual key ID you want to remove.

Therefore, when you execute this command with the correct key ID, it will remove the specified GPG key from the TeX Live Package Manager.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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