The Wiert Corner – irregular stream of stuff

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

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Archive for the ‘Power User’ Category

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linux – dmesg time vs system time time isnt correct – Server Fault

Posted by jpluimers on 2018/10/10

[WayBack] linux – dmesg time vs system time time isnt correct – Server Fault helped me solve this problem with an Odroid C1+ running busybox:

[root@meye-062016b9 ~]# hwclock --show
Wed Apr  3 20:25:47 2013  0.000000 seconds
[root@meye-062016b9 ~]# date
Wed May 31 09:48:18 UTC 2018
[root@meye-062016b9 ~]# hwclock --systohc --utc
[root@meye-062016b9 ~]# hwclock --show
Wed May 31 09:48:29 2018  0.000000 seconds
[root@meye-062016b9 ~]# date
Wed May 31 09:48:35 UTC 2018
[root@meye-062016b9 ~]#

Note: If your logging clock in /var/log/dmesg.log is wrong by an exact couple of hours, then try [WayBack] syslog time wrong – but date returns the correct time? and edit [WayBack] /etc/sysconfig/clock.

The above involves looking if I can get MotionEyeOS working Giving up on the official Ubuntu for Odroid C1 image.

So far not much luck: the Ubuntu got hosed, but before it was stable as in that didn’t reboot suddenly.

Now the MotionEyeOS (which is busybox based) reboots itself without notice about every 3 minutes, despite no other hardware connected and trying 3 different power supplies.

The Odroid C1+ only draws 0.34 Ampère at 5.13 Volt which is well within specs.

I’m puzzled:

[Wed May 31 09:49:51 2018] Booting Linux on physical CPU 0x200
[Wed May 31 09:52:20 2018] Booting Linux on physical CPU 0x200
[Wed May 31 09:54:50 2018] Booting Linux on physical CPU 0x200
[Wed May 31 09:57:19 2018] Booting Linux on physical CPU 0x200
[Wed May 31 09:59:49 2018] Booting Linux on physical CPU 0x200
[Wed May 31 10:02:22 2018] Booting Linux on physical CPU 0x200
[Wed May 31 10:04:56 2018] Booting Linux on physical CPU 0x200
[Wed May 31 10:07:26 2018] Booting Linux on physical CPU 0x200
[Wed May 31 10:09:59 2018] Booting Linux on physical CPU 0x200
[Wed May 31 10:12:29 2018] Booting Linux on physical CPU 0x200
[Wed May 31 10:14:58 2018] Booting Linux on physical CPU 0x200

—jeroen

Posted in *nix, *nix-tools, Power User | Leave a Comment »

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 »

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

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

aha (Ansi HTML Adapter) with clickable URIs

Posted by jpluimers on 2018/10/02

aha is great to generate HTML from ANSI text (i.e. the coloured output on a Linux console).

But it doesn’t generate clickable URIs (it can’t yet by itself as it only looks one character in the future).

The thread at https://github.com/theZiz/aha/issues/20 suggested a case-insensitive regex through sed but the exact suggestion failed for a few reasons I will explain below.

First the bash alias (requires both aha and perl):


#!/usr/bin/env bash
# based on https://github.com/theZiz/aha/issues/20#event-797466520
aha-with-expanded-http-https-urls()
{
aha | perl -C -Mutf8 -pe 's,([^"])((https?|s?ftp|ftps?|file)://.*?)([\s]|\&quot;\s),$1<a href="$2">$2</a>$4,gi'
}

view raw

testssh.sh-through-aha-with-expanded-http(s)-urls.bash

hosted with ❤ by GitHub

Read the rest of this entry »

Posted in *nix, *nix-tools, bash, bash, Development, Perl, Power User, RegEx, Scripting, Software Development | Leave a Comment »

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