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this post was submitted on 14 May 2025
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Linux
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From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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Some laptop battery firmware allows you to force discharge even when connected to AC, and if your laptop can use the
tlp recalibrateortlp dischargecommands then yours is supported.I use this to power my thinkpad servers off of their own batteries during a power outage, to reduce load on my UPS. Great feature.
Interesting setup. How would you tell your Thinkpads if there's a power outage?
The ups has data output to my firewall/router via usb, which the baremetal servers all connect to via apcupsd. When the ups loses or regains AC power, it broadcasts a message to all of them and they're each scripted to act accordingly: laptops run on their own batteries, vms migrate over to laptops, non-vital hardware shuts down, etc.