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===Root access===
[[File:Sudo on Ubuntu.png|thumb|Sudo command on Ubuntu to temporarily assume root privileges]]
Most Unix and Unix-like systems have an account or group which enables a user to exact complete control over the system, often known as a [[Superuser|root]] account. If access to this account is gained by an unwanted user, this results in a complete breach of the system. A root account however is necessary for administrative purposes, and for the above security reasons the root account is ''seldom'' used for day to day purposes (the [[sudo]] program is more commonly used), so usage of the root account can be more closely monitored.
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