Is there any OS X Yosemite System Administration Manual ?

I am looking for a System Administration Manual for Yosemite.
I own both an iMAC and a Macbook Pro Retina.
Many thanks.

Try a reset: Simultaneously hold down the Home and On buttons until the device shuts down. Ignore the off slider if it appears. Once shut down is complete, if it doesn't restart on it own, turn the device back on using the On button. In some cases it also helps to double click the Home button and close all apps BEFORE doing the reset.

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