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Description: 4.2. Practice: Configure a Firewall

It seems like the standard is to use sudo -i if you need to run more than a handful of commands as root (instead of running sudo every time).

In the before you begin section, add:

On serverX, become the root user.
[student@serverX ~]$ sudo -i

See ⁠3.2. Practice: Configuring Channel Bonding for an example.