Choose an access method
The following are considerations to be kept in mind when deciding on the access method:
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If there are other Linux virtual machine instances running on Google Cloud, you might need to share or restrict their user or application access to your VMs
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If user access to your Linux VM instances must be managed, you can use one of the following methods:
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OS Login
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Metadata SSH keys management
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Temporarily user access granted to an instance
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For this deployment example, the chosen method is SSH keys.