I just sshed to a jailbroken iPad(Pro 3, iOS 14.2), and found other than root and daemon, there’s an existing user mobile, which seems to come with the system. I was wondering

  1. what the user is for?
  2. if I do not change the password, can others ssh to my device with this account?
  3. if I do change the password, can it mess with the normal system operation?

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