security risk

How do I check the health of my 3ware RAID array under any Linux distribution? How do I access 3ware RAID Array web interface?

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I use sudo to provide permissions and command execution rights to other users under UNIX and Linux operating systems. However, I noticed something strange about sudo. When executing sudo, it will prompt for the user’s password the first time, but sudo no longer requires a password anymore when re-executing it. Why? Is this is a security risk?

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