tag #linux
good laugh! #programming #linux #code #10x #developer https://www.youtube.com/watch?v=kKAue9DiHc0
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I setup my RTL-SDR-v3 for HF on #Linux using #SDR ++. Used a 40m EFHW badly strung 5ft off the ground around the garden in #NVIS configuration. I was able to pick up CW from CA, NV, AZ and CA<->TX SSB. Also FT8 and JS8. Problem: on the #CW end of the band, I’m picking up an AM station which I assume is coming in via IF. Do I need real ground? or better common mode choke? Please advise. Having sold my bulky G90, I will use SDR, learn CW and get QCX once I can “hear” :)
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Needed a #USB3 #Wifi6 adapter for my backup server, as the old atheros 9k got flaky. Found this Mediatek based nic supported by mt7921u driver in #linux kernel 6.1 + firmware blob (firmware-misc-nonfree package on #debian ). My dhcpcd immediately got dhcp lease upon plugging (’n-play). The device came with high gain antennas and was only $25!! https://www.amazon.com/dp/B0CVVWNSH2?psc=1&ref=ppx_yo2ov_dt_b_product_details
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#Cups #OpenPrinting project and printers themselves came a long way since Cups 1.x. Internet Printing Protocol #IPP uses a pdf/raster payload and supports config exchange - no more PCL/PS/custom printer languages. No more PPD files and no binary drivers from manufacturers \o/ Now if I could point cups-client to a IPP network printer directly (via client.conf) that would be perfect - faster than avahi and less overhead than having cups-service daemon on my network.
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Recently updated my main linux box and couldn’t rebuild one of my own system management tools from 2002. The cause were old #autoconf and #automake artifacts. Spent 2h cleaning up and regenerating from .ac and .am files. Remembered how miserable #autoconf and #automake really are: shell based, slow and dropping a ton of persistent artifacts in my source tree. After finishing, I found #meson as a modern replacement, see: https://mesonbuild.com/Comparisons.html
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As much as I disliked systemd initially, I hate working with hacky shell script based sys-v-init. Recently I needed a short daemon to monitor network connectivity of my backup server. I wrote a py program to do that and instead of making it a daemon with backgrounding, logging, writing sysv scripts for it etc, I wrote a 10 line systemd service definition. Anything it prints to stdout+stderr gets logged, it is auto-restarted, memory limits, enabled on startup etc. SIMPLE.
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Sat down and added arduinio-mini based GPIO to my ZimaBoard based backup server in ATX case. Previously, I used rpi for this purpose and controlled ATX power supply with GPIO to turn on and off power to hard drives when not in use. Since ZimaBoard does not have GPIO, usb powered ardunio exchanging data via serial interface fills this purpose. Turned out really reliable with clean install.
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RPI4 killer, a Zimaboard 432. For $140 one gets an Intel single board computer with quad core celeron 2.2ghz with virtualization, Intel graphics, 4GiB ram, 32GB ssd, 2x native SATA, 2x USB3, 2x GbE, display port AND PCI-E 4x bus. Has integrated aluminium case which acts as heat sink and only 6W TDP. Comes with wall-wart PSU too. Throw in $10 usb wifi and $10 arduino mini for GPIO and never look back at rpi. This will be my replacement home backup server.
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