Neat tip to force a fsch on the root partition on next reboot (from: http://raspberrypi.stackexchange.com/questions/3289/checking-sdcard-for-errors-unmount-problem )
sudo touch /forcefsckScheduling scripts to run at boot on Raspbian (Raspberry Pi)
There’s always a dozen ways to do anything on Linux, and I was looking for a quick and easy way to run a script at startup on Raspbian on a Raspberry Pi.
I found this post:
http://raspberrypi.stackexchange.com/questions/8734/execute-script-on-start-up
which has a number of good suggestions, but the quickest and easiest approach is probably to add a @reboot entry to crontab, as suggested in this post here.
Amateur Radio related uses for your Raspberry Pi
Here’s a collection of Amateur Radio and other general radio related possible uses and ideas for using a Raspberry Pi. Some of these ideas could be used in connection with each other, or just solo.
This list is a collection of ideas for the basis of an upcoming presentation; more on that later. Right now, a collection of links for reference.
Simple:
- as a simple/cheap Logging computer:
Easy:
- ADS-B aircraft transponder receiver (http://www.rtl-sdr.com/adsb-aircraft-radar-with-rtl-sdr/)
Slightly more involved:
- APRS tracker (mobile APRS – ping beacon packets with location)
- Software Defined Radio using RTL USB dongle and rtl-sdr (https://www.kevinhooke.com/2014/07/26/installing-rtl-sdr-and-dump1090-on-a-raspberry-pi-to-receive-ads-b-signals/)
- CW progation beacon transmitter (http://hackaday.com/2013/01/25/raspberry-pi-used-as-a-beacon-transmitter/)
- APRS i-gate (internet gateway for APRS data)
- WSPR transmitter / WspryPi / TAPR Whispering Raspberries QRP Tx Shield
More involved:
- Soundcard based Packet Packet TNC, using Direwolf: https://github.com/wb2osz/direwolf
- Hardware Packet Radio using a TNC-Pi add on board
- RadWav SDR transceiver add-on board $150: http://www.radwav.com/index.html
- QTSDR – SDR transceiver (https://github.com/ha7ilm/qtcsdr)
Other links with more ideas:
Android Studio – useful notes (1)
Having worked for years with Eclipse (and some time with Netbeans), I have to admit that using Android Studio (based on InteliJ) I’m fining harder that what it should be. Where’s all my key shortcut combinations!
Whenever I use Netbeans, I use the Eclipse keymappings option in the settings, so I don’t have to remember any new key shortcuts. I’m not sure if Android Studio/IntelliJ has this option as well, but in the meantime, here’s some notes for useful things to remember.
Organize Imports (Eclipse: shift-Ctrl-O) / Optimize Imports: Ctrl-Opt-O
Jump to definition (Eclipse: F3) : Opt-Cmd-B
Fix error with popup suggestion: Opt-Return
Other useful Android development related posts:
http://stackoverflow.com/questions/17252870/how-to-show-compilation-errors-in-android-studio
http://stackoverflow.com/questions/2364811/how-do-i-write-outputs-to-the-log-in-android