9.1. Why You Need a CLI
Despite their age, CLIs are still one of the most-requested features for Linux appliances, especially network appliances that will be installed in a server room or network operations center. Let's look in turn at each of the major reasons to have a CLI on your appliance:
Security
Availability
Bandwidth
Scriptability
Configuration backup and restore
9.1.1. Security
Many service providers will reject an appliance that places its control and status protocol on the same wire as user data; the setup they prefer is an entirely separate physical channel that is dedicated to management of the appliance. Historically, this separate channel has been an RS-232 interface with a CLI on it. The RS-232 lines are routed to the control center ...
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