Mac OS X Tiger install DVD
Screenshot features in Mac OS X and MacOS
10.13 High Sierra and earlier : Use key shortcuts (see below) or Grab.app (see here)
11.14 Mojave and after: Snapshot.app (more info here):
- Similar to Grab but after you’ve taken the snapshot it allows you to annotate/markup the screenshot, and then you can either copy and paste from there or save as a file.
- Additionally in Screenshot, it remembers the position on screen of an area screenshot so you can easily take repeated screenshots from the same portion of your screen.
Key shortcuts in all Mac OS X / MacOS versions (see here)
Shift + Cmd + 3 : captures whole screen
Shift + Cmd + 4 : starts a region screenshot, select a region of the screen
- before 10.14 Mojave, saves a .png to your desktop
- 10.14 Mojave and after – opens screenshot in the Screenshot editor app
Apple Xserve ad in September 2002 of Java Developer’s Journal magazine
Dual 1Ghz G4 processors? Wow, I always assumed these had more horsepower than this? Still a beautiful looking server though
PiAware dump1090 no longer loading on 8080 (and easy solution)
I recently noticed that my dump1090/PiAware web ui stopped loading. The unusual thing was that part of the webapp appeared to load but then it would hang with the ‘please wait’ spinner.
Looking in dev tools in Chrome, there’s a bunch of 404s on the data feeds:
A quick search found a couple of useful posts, especially this one, suggesting to first check the logs, with:
sudo journalctl -u dump1090-fa -n50 --no-pager
And here’s what I found:
Apr 22 20:24:02 raspberrypi systemd[1]: dump1090-fa.service holdoff time over, scheduling restart. Apr 22 20:24:02 raspberrypi systemd[1]: Stopping dump1090 ADS-B receiver (FlightAware customization)… Apr 22 20:24:02 raspberrypi systemd[1]: Starting dump1090 ADS-B receiver (FlightAware customization)… Apr 22 20:24:02 raspberrypi systemd[1]: Started dump1090 ADS-B receiver (FlightAware customization). Apr 22 20:24:02 raspberrypi dump1090-fa[27365]: Wed Apr 22 20:24:02 2020 PDT dump1090-fa 3.5.1 starting up. Apr 22 20:24:02 raspberrypi dump1090-fa[27365]: rtlsdr: no supported devices found. Apr 22 20:24:02 raspberrypi systemd[1]: dump1090-fa.service: main process exited, code=exited, status=1/FAILURE Apr 22 20:24:02 raspberrypi systemd[1]: Unit dump1090-fa.service entered failed state.
Here’s your problem, right here:
dump1090-fa[27365]: rtlsdr: no supported devices found.
Quick fix, pushed the rtl-sdr usb dongle back in (it had come slightly loose) and rebooted, problem solved:
-- Logs begin at Wed 2020-04-22 20:27:02 PDT, end at Wed 2020-04-22 20:27:55 PDT. -- Apr 22 20:27:05 raspberrypi systemd[1]: Starting dump1090 ADS-B receiver (FlightAware customization)… Apr 22 20:27:05 raspberrypi systemd[1]: Started dump1090 ADS-B receiver (FlightAware customization). Apr 22 20:27:05 raspberrypi dump1090-fa[571]: Wed Apr 22 20:27:05 2020 PDT dump1090-fa 3.5.1 starting up. Apr 22 20:27:05 raspberrypi dump1090-fa[571]: rtlsdr: using device #0: Terratec T Stick PLUS (Realtek, RTL2838UHIDIR, SN 00000001) Apr 22 20:27:05 raspberrypi dump1090-fa[571]: Found Elonics E4000 tuner Apr 22 20:27:05 raspberrypi dump1090-fa[571]: rtlsdr: enabling tuner AGC
Problem solved – look at that empty sky over Sacramento!
