Computers

Stub here to act as a table of contents sorts to our important computers / servers / related information.

Barrow Dreamplug -- Kind of decommissioned at this point.
- Related though is Network Information on Barrow
- It is old and still up in Barrow in the control shed. Still works but I sent the raspberry pis up to replace it. My plan is to replace it with a small server with a different computer architecture this winter. The reason for that over these small ARM processors is that I'm still trying to work around this weak telemetry problem. Thinking that if it is an x86 (well 64 bit but that style of CPU) that we can leave a copy of loggernet running up there so that when the network goes down as long as the unit is on we are still in business. I am working to put all of its configs in one location though. What was unique to it that hasn't been documented yet is that it used its second ethernet port as a DHCP server in support of a PTZ web cam. That required an additional package, special iptables rules, and some scripts in /usr/local/bin. On the to do list to get going at some point.
Decommisioned Serial Server Config and notes

Primary LoggerNet server

Primary Data processing server & data sharing web server

Debian Linux virtual machine
Located in IARC server room
Function is main data processing server and web server for sharing data with 3rd parties
Online repositories for processing scripts:
- Cron related: https://github.alaska.edu/rcbusey/processing_bash_scripts
- Bash Utilities: https://github.alaska.edu/rcbusey/bash_utilities
- Python Utilities: https://github.alaska.edu/rcbusey/python_utilities
- DataPro V3 & other python utilities from Ross: https://github.com/rwspicer/csv_utilities

Similar to NGEEDATA

Debian VM
Function is main data processing server and web server for sharing data with 3rd parties
werc.uaf

Initial Debian Server Setup
Baud Rate Backgrounder - (I know...)
Automated System Work Flow
IP Tables Firewall Example
Disable Autoreboot in windows 10 update: http://www.tenforums.com/windows-updates-activation/17530-disable-automatic-reboot-updates.html
Side note: If you do any buliding of these low power linux systems, start with an industrial microSD card. Have had intermittent issues with memory corruption on consumer grade cards. Search digikey etc for extended temperature industrial models. SLC or MLC and temperature range to -25C or -40C is easy to find there. Similar deal for the Compact Flash cards for the CSI cmf100.
Related... I've kind of standardized on 16 or 32GB industrial cards. to back them up I use the command line tool dd:

dd if=/dev/sdb of=backupofsystem.img bs=4096

that creates a pretty large file that is mostly empty. So, follow this page to shrink things:
- https://softwarebakery.com/shrinking-images-on-linux
- I guess the alternative is to just gzip the large file... then use dd to copy the file onto new media:

dd if=backpuofsystem.img of=/dev/sdb bs=4096

- if say the image is 32gb but the media is a 16gb card the file system will extend beyond the length of the card. That caused a boot error (of course) but I was able to use gparted the tool mentioned on the softwarebakery link to resize the file system on the new card.

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