User:Kim/Special Issue 27/uptime: Difference between revisions
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<code>$ uptime</code> | <code>$ uptime</code> is a command that returns set of values involving, the '''current time''', and the '''amount of time system is in running state''', '''number of users''' currently logged in, and the '''load time for the past 1, 5 and 15 minutes''' respectively. <br> | ||
==Raspberry Pi== | ==Raspberry Pi== | ||
''which model do we use?'' | ''which model do we use?'' | ||
Revision as of 17:34, 24 May 2025
$ uptime is a command that returns set of values involving, the current time, and the amount of time system is in running state, number of users currently logged in, and the load time for the past 1, 5 and 15 minutes respectively.
Raspberry Pi
which model do we use?
Materials
| Material | Application
(on the raspberry pi) |
Source | Method of sourcing | Reference |
|---|---|---|---|---|
| Silicon Dioxide
(from Sand) |
Semiconductor chip (CPU + GPU)
Broadcom BCM2835 [1] + Circuit Board (fiber glass) |
coastal + riverbed areas Worldwide [2] | mining | "Raspberry Pi LifeCycle: Materials", Iyesha Puri
2016 [3] |
| Copper | Circuit Board (conductive pathways) | extraction / mining | ||
| Tin | Electrical Ports | |||
| Silver | ||||
| Palladium | ||||
| Gold |
- ↑ a crystal is grown from the purified silicon (silicon ingot). then cut into a "wafer", ultrathin layer which builds the basis for semiconductor chip
- ↑ on the biological impact of sand extraction and why it is scarcer than one might think https://www.greenfacts.org/en/sand-extraction/index.htm#1
- ↑ https://www.designlife-cycle.com/raspberry-pi