Question: How are users categorized? In Linux, which user has all the privileges? Why do we need groups for user management? What is the command to

How are users categorized?

In Linux, which user has all the privileges?

Why do we need groups for user management?

What is the command to change the root users password on Ubuntu?

What are the three files mentioned in this chapter that contain information about a users account and the users group?

Explain the meaning of each column in the file/etc/passwd.

Explain the meaning of each column in the file/etc/shadow.

Describe the DHCP assigning process.

What are the benefits of using DHCP?

What are the values of the default lease time and the maximum lease time?

Why do we need the name service?

List at least five category-based top-level domains.

What is the maximum number of layers that can be added to the name hierarchy?

What is a root server?

What is a forward lookup process?

What is a reverse lookup process?

Before forwarding the name resolution request to the root server, what does the operating system need to check first?

What is the DNS zone?

What is an NS DNS record?

What is an SOA DNS record?

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