The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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tcp – How can I trigger a script when a certain port becomes available for requests? – Unix & Linux Stack Exchange

Posted by jpluimers on 2018/10/09

Netcat to the rescue waiting for a Windows 10 upgrade to finish (which can take hours):

while ! nc -z 172.22.0.67 3389; do echo "sleeping"; sleep 10; done; echo 'The server is up!'

Via: [WayBack] tcp – How can I trigger a script when a certain port becomes available for requests? – Unix & Linux Stack Exchange, quoting from the answer:

  • nc is Netcat, “the Swiss-army knife for TCP/IP”,
  • -z means: do not send any data, just check if the port is open,
  • while ! nc -z …; do sleep 0.1; done: keep checking and sleeping for one tenth of a second until the port opens up, i.e. Netcat returns with a zero (success) status.

–jeroen

Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Power User, TCP, Windows | Leave a Comment »

Giving up on the official Ubuntu for Odroid C1 image

Posted by jpluimers on 2018/10/09

After the trouble in Ubuntu: Fixing the myserious “Failed to stop apt-daily.timer: Connection timed out” I got into more trouble:
apt-get update && apt-get upgrade hung the device.

It booted fine, but a new update showed it was in a hosed state.

I don’t expect vendor supported distributions to fail this way, so I gave up on the ubuntu-16.04-minimal-odroid-c1-20160817.img.xz .

–jeroen


root@odroidC1:~# apt-get update && apt-get upgrade
Hit:1 http://ports.ubuntu.com/ubuntu-ports xenial InRelease
Hit:2 http://ports.ubuntu.com/ubuntu-ports xenial-updates InRelease
Hit:3 http://ports.ubuntu.com/ubuntu-ports xenial-backports InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports xenial-security InRelease
Hit:5 http://deb.odroid.in/c1 xenial InRelease
Reading package lists… Done
E: dpkg was interrupted, you must manually run 'dpkg –configure -a' to correct the problem.
root@odroidC1:~# dpkg –configure -a
Processing triggers for ureadahead (0.100.0-19) …
Setting up initramfs-tools (0.122ubuntu8.8) …
update-initramfs: deferring update (trigger activated)
Processing triggers for systemd (229-4ubuntu17) …
Processing triggers for initramfs-tools (0.122ubuntu8.8) …
update-initramfs: Generating /boot/initrd.img-4.4.0-28-generic
WARNING: missing /lib/modules/4.4.0-28-generic
Ensure all necessary drivers are built into the linux image!
depmod: ERROR: could not open directory /lib/modules/4.4.0-28-generic: No such file or directory
depmod: FATAL: could not search modules: No such file or directory
depmod: WARNING: could not open /var/tmp/mkinitramfs_FQEGW2/lib/modules/4.4.0-28-generic/modules.order: No such file or directory
depmod: WARNING: could not open /var/tmp/mkinitramfs_FQEGW2/lib/modules/4.4.0-28-generic/modules.builtin: No such file or directory
root@odroidC1:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 396M 0 396M 0% /dev
tmpfs 81M 3.3M 78M 5% /run
/dev/mmcblk0p2 59G 1.1G 55G 2% /
tmpfs 403M 0 403M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 403M 0 403M 0% /sys/fs/cgroup
/dev/mmcblk0p1 128M 11M 118M 9% /media/boot

view raw

giving-up-on-ubuntu-image-for-odroid-c1.txt

hosted with ❤ by GitHub

Posted in Development, Hardware Development, Odroid | 3 Comments »

A Key’s Odyssey – the path of a keystroke message through the VCL

Posted by jpluimers on 2018/10/09

Blast from the past, but still relevant, this article by Peter Below:

This article follows the path of a keystroke message through the VCL. You will learn how the key processing is implemented, how the OnKey events work and what intervention points for the programmer can be found in the whole process. In addition, things like message processing are explained, and you will learn how to trace messages in the debugger from the message loop to their eventual destination.

Source: [WayBack] A Key’s Odyssey

Via: [WayBack] Vcl.Controls.pasprocedure TWinControl.CNKeyDown(var Message: TWMKeyDown);..if IsMenuKey(Message) then Exit; … – Attila Kovacs – Google+

-jeroen

Posted in Conference Topics, Conferences, Delphi, Development, Event, Software Development | Leave a Comment »

Check If A Linux System Is Physical Or Virtual Machine

Posted by jpluimers on 2018/10/08

One day I am going to try to extend this for a few other virtualisation environments and Linux distributions: [WayBack] Check If A Linux System Is Physical Or Virtual Machine

Via: [WayBack] Check If A Linux System Is Physical Or Virtual Machine #Linux – Joe C. Hecht – Google+

–jeroen

Posted in *nix, *nix-tools, Fusion, Hyper-V, KVM Kernel-based Virtual Machine, Power User, Proxmox, View, VirtualBox, Virtualization, VMware, VMware ESXi, VMware Workstation | Leave a Comment »

Video Conversion done right: Codecs and Software – Super User Blog

Posted by jpluimers on 2018/10/08

From a very long time ago, but still a great references: [WayBack] Video Conversion done right: Codecs and Software – Super User Blog.

Read the rest of this entry »

Posted in Audio, ffmpeg, Media, Power User, Video | Leave a Comment »

Seven Steps to the Diagnosis of NSAIDs Hypersensitivity: How to Apply a New Classification in Real Practice?

Posted by jpluimers on 2018/10/08

For Ibuprofen, I have type B, but need to figure out how severe and which subcategory then find out if I’m also affected by other NSAIDs.

[WayBack] Seven Steps to the Diagnosis of NSAIDs Hypersensitivity: How to Apply a New Classification in Real Practice?

Tables and figures:

Via: [WayBack] 李麟 – Google+ commenting at [WayBack] This shirt on one of my fellow archers today… “Sons of Ibuprofen” – Lars Fosdal – Google+

–jeroen

Posted in About, LifeHacker, Personal, Power User | Leave a Comment »

Why Youtube’s algorithms push extreme content on every possible subject / Boing Boing

Posted by jpluimers on 2018/10/05

Food for thought: [WayBack] Why Youtube’s algorithms push extreme content on every possible subject / Boing Boing.

the problems of Youtube’s recommender algorithms might be that they overdistil your preferences. Since they’re aiming for “engagement” — a word I am beginning to loathe with an unsettling level of emotion — the real problem with these algorithms is they’re constantly aiming to create an epic sense of drama and newness

More in depth at [WayBack] Opinion | YouTube, the Great Radicalizer – The New York Times

Via [WayBack] Kristian Köhntopp – Google+.

–jeroen

Posted in Power User, SocialMedia, YouTube | Leave a Comment »

macOS / OS X / Mac OS X: excessive sysmond or mds CPU usage – via Ask Different and osXdaily

Posted by jpluimers on 2018/10/05

If you suffer from [WayBack] macos – Excessive CPU usage from sysmond – Ask Different, then it could be Activity Monitor itself using that CPU.

If you suffer from high CPU usage in mds, then it is likely the Spotlight search indexer acting up: [WayBack] mds – what MDS process is and why it uses CPU on the Mac

–jeroen

Posted in Apple, Mac, Mac OS X / OS X / MacOS, Power User, SpotLight | Leave a Comment »

Raspberry Pi as CD changer in pre 09/2002 E46 BMW 320i touring

Posted by jpluimers on 2018/10/05

My pre 09/2002 E46 BMW 320i touring didn’t come with a CD-changer, and since the Business CD head-unit didn’t support the regular AUX mechanisms (see links further below), I’m researching how to add a Raspberry Pi as CD-changer.

A few things I want to accomplish:

  • Raspberry Pi powers up as it has ignition signal
  • Raspberry Pi powers down soon after it has lost ignition signal
  • Connected via the CD-changer connectors (iBus and audio) in the back

Some links:

Supplying power:

iBus/kBus/CanBUS:

If the model was more recent, it would at least support AUX, but it doesn’t by default and the work-arounds seem to emulate a CD-changer after all:

Read the rest of this entry »

Posted in cars, E46 320i touring, LifeHacker, Power User | Leave a Comment »

Syncthing – on my research list

Posted by jpluimers on 2018/10/05

On my research list:

Syncthing replaces proprietary sync and cloud services with something open, trustworthy and decentralized.

[WayBack] Syncthing

Though it’s ont easy to get right: [WayBack] SyncThing for Android – twm’s blog

which references:

Via: [WayBack] I blogged about SyncThing before, when BitTorrentSync started to annoy the hell out of me. SyncThing is an open source tool for synchronizing directory trees between different devices without requiring a cloud service (it needs a discovery server though… – Thomas Mueller (dummzeuch) – Google+

–jeroen

Read the rest of this entry »

Posted in Cloud, Infrastructure, Power User | Leave a Comment »

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