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There may be times when you want to change system states after you have powered up your computer. For most administrative duties, you must change the system state from the networking state (system state 3) to the single-user state (system state S or s), or the administrative state (system state 1).
To change states, the shutdown or init command can be executed with an argument that specifies the desired system state. Use of the shutdown command is generally recommended. (See ``System states'' for a list of system states.)