December 2023 - Lug-nuts

Apache support for tomcat proxy
by Brian E. Lavender 03 Jan '24

03 Jan '24

I found a page for doing proxy between Apache httpd and Apache Tomcat. https://tomcat.apache.org/tomcat-9.0-doc/proxy-howto.html -- Brian Lavender http://www.brie.com/brian/ "There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies." Professor C. A. R. Hoare The 1980 Turing award lecture

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phonnes
by Gary 28 Dec '23

28 Dec '23

tt seems like phones are locked down pretty tight. For example, it doesn't seem like you can vnc into the phone unless you are on the phones hot spot. Not only that, you can't use a remote ssh tunnel either, which kind of surprised me. I've take care to confirm that the firewall and SE Lonux settings would allow access to the required/specified ports. Is this right? Is there a way around? I have a location that doesn't have wifi on it's own and don't want to pay full rate just so I can occasionally access a little home automation. -Gary

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Made it thru the rain - drive safe!
by Sen Hastings 19 Dec '23

19 Dec '23

Hey yall, I made it to the meetup location in spite of the weather. Should have everything set up in a few mins. Sen-h.

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Waveshare pi hat details
by Brian E. Lavender 19 Dec '23

19 Dec '23

Hi Everyone, Here are some notes (raw) on my "show-and-tell" raspberry pi with the Sense Hat (B). I also included a link to my github fork of the stratux. My fork of the Stratux project https://github.com/brieweb/stratux Sense HAT (B) for Raspberry Pi, Multi Powerful Sensors https://www.waveshare.com/sense-hat-b.htm Wiki page for the SenseHat(B) https://www.waveshare.com/wiki/Sense_HAT_(B) C program demos for the Sense Hat (B) https://files.waveshare.com/upload/6/6c/Sense-HAT-B-Demo.7z Datasheet for 20948 chip https://invensense.tdk.com/download-pdf/icm-20948-datasheet/ MPU9250 – 9-Axis Sensor Module – Part 1 https://wolles-elektronikkiste.de/en/mpu9250-9-axis-sensor-module-part-1 MPU9250 – 9-Axis Sensor Module – Part 2 https://wolles-elektronikkiste.de/en/mpu9250-9-axis-sensor-module-part-2 Explains the registers for the chip https://youtu.be/Oen3HqUbctM BCM 2835 library for talking through the Broadcom controller that connects to the I2C bus. https://www.airspayce.com/mikem/bcm2835/ Eric Westphal Go AHRS code https://github.com/westphae/goflying/ Code snippet ``` unsigned short I2C_readU16(char reg) { char buf[] = { reg,0 }; bcm2835_i2c_read_register_rs(&reg, buf, 2); int value = buf[1] * 0x100 + buf[0]; return value; } ``` -- Brian Lavender http://www.brie.com/brian/ "There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies." Professor C. A. R. Hoare The 1980 Turing award lecture

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debian network interface names
by Brian E. Lavender 18 Dec '23

18 Dec '23

When I tried updating the mailing list server, I got /dev/enX0 for the ethernet! Ugh. I found these documents on the interfaces. https://wiki.debian.org/NewInBuster#Network_interface_name_migration Anyone else encounter issues? Brian -- Brian Lavender http://www.brie.com/brian/ "There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies." Professor C. A. R. Hoare The 1980 Turing award lecture

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test test
by Brian E. Lavender 17 Dec '23

17 Dec '23

Mailing list working? Check check -- Brian Lavender http://www.brie.com/brian/ "There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies." Professor C. A. R. Hoare The 1980 Turing award lecture

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list still here?
by Brian E. Lavender 17 Dec '23

17 Dec '23

I tried upgrading, yet it had some issues! I ended up reverting to old image.... -- Brian Lavender http://www.brie.com/brian/ "There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies." Professor C. A. R. Hoare The 1980 Turing award lecture

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upgraded list server to Debian 12
by Brian E. Lavender 17 Dec '23

17 Dec '23

I am checking to see if it still works! Shotgun approach! I mirrored the image to a new server. I see that the mailing list allows a max message size of 40kb. I think we ought to figure out how to bost that a little bit! Brian -- Brian Lavender http://www.brie.com/brian/ "There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies." Professor C. A. R. Hoare The 1980 Turing award lecture

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Images on the web
by Sen Hastings 16 Dec '23

16 Dec '23

Just stumbled across this today: https://ist.uwaterloo.ca/~anderson/images/index.html It's a fascinating look at older practices of images on the web. I like this page especially: https://ist.uwaterloo.ca/~anderson/images/GIFvsJPEG/SameImageDiffSizes.html

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libcap
by Brian E. Lavender 07 Dec '23

07 Dec '23

I did not know! "Not needing root to administer Linux - the home of libcap" https://sites.google.com/site/fullycapable/ I discovered this while investigating the source for "C library for Broadcom BCM 2835" http://www.airspayce.com/mikem/bcm2835/ -- Brian Lavender http://www.brie.com/brian/ "There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies." Professor C. A. R. Hoare The 1980 Turing award lecture

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Lug-nuts December 2023