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| UPS HOWTO| Revision History |
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| Revision 2.2 | 2007-05-22 | Revised by: esr | | Minor update with more info about battery types. | | Revision 2.1 | 2005-09-28 | Revised by: esr | | Link fixes. | | Revision 2.0 | 2005-08-15 | Revised by: esr | | Merged in material by Nick Christenson. | | Revision 1.3 | 2005-08-17 | Revised by: esr | | Fix a bad link. | | Revision 1.2 | 2004-10-28 | Revised by: esr | | Remove a bad link. | | Revision 1.1 | 2004-02-21 | Revised by: esr | | Add a little deployment advice, and stuff on other technologies. | | Revision 1.0 | 2003-10-07 | Revised by: esr | | Initial release. |
An Uninterruptible Power Supply (UPS) is an important thing to have
if you live in an area where power outages are at all common,
especially if you run a mail/DNS/Web server that must be up 24/7. This
HOWTO will teach you things you need to know to select a UPS
intelligently and make it work with your open-source operating system.
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Free eBook: 
