UESENSOR(8)

💅 uesensor — bestie's guide to system environmental sensors

okay so real quick — you're looking at uesensor, section 8 of the Linux on Power Service Tools manual. she's a little utility, she's iconic, and she's about to tell you what your machine's sensors are feeling rn. let's get into it 💖

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✨ NAME ✨

uesensor — view the state of system environmental sensors

like, literally just peek at how your hardware's doing. temperature, fans, voltage, power supplies. the whole vibe check 🌡️🌀⚡🔌

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🫶 SYNOPSIS 🫶

/usr/sbin/uesensor -l |  -a
/usr/sbin/uesensor -t token -i index [-v]

two modes, bestie: list everything or ask about one specific sensor. pick your fighter 💅

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🌸 DESCRIPTION 🌸

so uesensor is used to view the state of environmental sensors on PowerPC-64 machines. that's the whole assignment, and she ate. ✨

there are 4 types of system sensors you can retrieve with uesensor, and each one has an identifying token:

• 3 — Thermal sensor 🌡️
• 9001 — Fan speed sensor 🌀
• 9002 — Voltage sensor ⚡
• 9004 — Power supply sensor 🔌

each sensor is uniquely identified by a combination of token and index number. index numbers start at 0 and are contiguous (no gaps, no skips, no drama). for example, the second fan on the system would be identified by token number 9001 and index 1. iykyk 🎀

the state of each sensor consists of a status and a measured value. the status value is one of these:

• 9 — Critical low 😭
• 10 — Warning low 🙈
• 11 — Normal ✨ (the slay status)
• 12 — Warning high 🔥
• 13 — Critical high 💀

the measured value depends on the type of sensor, obviously:

• Thermal sensors are measured in degrees Celcius 🌡️
• Fan speed is measured in revolutions per minute 🌀
• Voltage is measured in millivolts ⚡
• Power supply measurements are defined as follows:
• 0 — Not present
• 1 — Present and not operational
• 2 — Status unknown
• 3 — Present and operational

each sensor is also associated with a location code. heads up though: this location code may not be unique — for example, there may be multiple voltage sensors on a planar. so like, don't @ her about it, it's by design 🫶

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🦋 OPTIONS 🦋

• -l — List all the sensors in human-readable format. cute, friendly, readable. main character energy 🌈
• -a — List all the sensors in a tabular, numerical format. one line will be printed for each sensor in the following format:

<token> <index> <status> <measured_value> <location_code>

(yes she's giving spreadsheet. yes it's still slay 📊)

• -t token — Specify the token of a specific sensor to query. also requires the -i option to be specified. they're a package deal, fr fr 👑
• -i index — Specify the index of a specific sensor to query. also requires the -t option to be specified. see above, the duo is inseparable 💜
• -v — Print the measured value rather than the sensor status, which is the default value printed. requires both the -t and -i options to be specified. no shortcuts bestie 💅

⭐ quick reminder: -l and -a are your listing modes. -t + -i (plus optionally -v) are your "tell me about this exact sensor" mode. don't mix and match, she's not that kind of girl.

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👑 SEE ALSO 👑

usysident(8), usysattn(8) — her sisters, also iconic, go say hi 🫶

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that's the whole page bestie, no cap, every detail intact 🎀

source/version: Linux · May 2004 · UESENSOR(8) — yeah she's vintage, she's still serving 💜🧚‍♀️