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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when btrfs-size shows a snapshot as 16777216.00TB or btrfs qgroup as 16.00EiB

Posted by jpluimers on 2018/10/19

A long time ago I wrote about the btrfs-size tool: [WayBack] A bash script to btrfs snapshot details like disk sizes (requires btrfs quota to be enabled).

One day, it showed a ridiculously large size for /tmp:

# ./btrfs-size.sh 
=============================================================================================================================================================================================================================================================
Snapshot / Subvolume                                               ID   Total    Exclusive Data
=============================================================================================================================================================================================================================================================
257 gen 855182 top level 5 path .snapshots                         257  4.30MB   4.30MB   
258 gen 856438 top level 257 path .snapshots/1/snapshot            258  1.84GB   193.01MB 
...
262 gen 856438 top level 5 path srv                                262  1.83GB   1.83GB   
263 gen 856438 top level 5 path tmp                                263  16777216.00TB16777216.00TB
264 gen 856438 top level 5 path usr/local                          264  260.00KB 260.00KB 
...
990 gen 849192 top level 257 path .snapshots/583/snapshot          990  1.83GB   8.23MB   
991 gen 849224 top level 257 path .snapshots/584/snapshot          991  2.09GB   62.66MB  
=============================================================================================================================================================================================================================================================
                                                                Exclusive Total: 3.26GB

This tracks back to the output of this command, which I’ve shortened a bit:

# btrfs qgroup show /
qgroupid         rfer         excl
--------         ----         ----
0/5          16.00KiB     16.00KiB
0/257         4.30MiB      4.30MiB
...
0/262         1.83GiB      1.83GiB
0/263        16.00EiB     16.00EiB
0/264       260.00KiB    260.00KiB
...
255/274         0.00B        0.00B
255/797      16.00KiB     16.00KiB

This is a known issue as quotas in btrfs – though workable – aren’t fully stable yet: [WayBack] Linux BTRFS Storage: Re: During a btrfs balance nearly all quotas of the subvolumes became exceeded

It also provides this simple solution:

Read the rest of this entry »

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

Some links on encrypting configuration files or sections

Posted by jpluimers on 2018/10/18

All encryption comes down to a combination of key management and tooling.

With more and more communication projects going on, encryption of the secrets (passwords, API keys, etc) in configuration files, especially the ones that might end up in (sometimes public) repositories will need my attention some day.

My gut feeling is that an asymmetric solution might work best for these kinds of problems.

Here are some links:

–jeroen

Posted in Development, Encryption, Security, Software Development | Leave a Comment »

Quickly finding and debugging jQuery event handlers with findHandlersJS – The Blinking Caret

Posted by jpluimers on 2018/10/16

tl;dr: Finding event handlers registered using jQuery can be tricky. findHandlersJS makes finding them easy, all you need is the event type and a jQuery selector for the elements where the events might originate.

I need to invest some time in using this: [WayBack] Quickly finding and debugging jQuery event handlers with findHandlersJS – The Blinking Caret

Sourcecode: [WayBack] raw.githubusercontent.com/ruidfigueiredo/findHandlersJS/master/findEventHandlers.js

References:

Via: [WayBack] javascript – Chrome Dev Tools : view all event listeners used in the page – Stack Overflow

–jeroen

Posted in Chrome, Development, Google, JavaScript/ECMAScript, jQuery, Power User, Scripting, Software Development, Web Browsers, Web Development | Leave a Comment »

macOS Sierra: Change the order of the network ports your computer uses to connect

Posted by jpluimers on 2018/10/15

Very useful when you want to give your WiFi less priority than an USB or Thunderbolt network adapter: [WayBack] macOS Sierra: Change the order of the network ports your computer uses to connect.

It is not just that the topmost adapter gets more priority: it also determines the DNS search!

Anyway: after choosing “Set Service Order” on the right, choose the order as seen below.

–jeroen

PS: Since Apple is cleaning up their site, only the above WayBack works, but luckily the below link explains it in a very similar way when using Locations:

[WayBack] How to use network locations on your Mac – Apple Support

 

 

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

Why Are My Text Messages Stuck Pending | Pushbullet Help Central

Posted by jpluimers on 2018/10/15

Try this fix first:

For many, this issue goes away by simply reinstalling our Android app on your phone. We suggest giving this a try first.

That didn’t work, but this did:

Check that the correct device is selected in the top left of the SMS interface.

You may have an old device selected, which is preventing SMS from working correctly. Check that the correct device is selected in the drop down. You can remove old devices here.

It looks like all my old smartphones were still there despite not being a SIM card in them. Removing all but my active phone solved the problem.

Source: [WayBack] Why Are My Text Messages Stuck Pending | Pushbullet Help Central

–jeroen

Posted in Android Devices, Chrome, Google, Power User | Leave a Comment »

Aside from the Wayback Machine, what are other options for getting screenshots of websites from the past? – Quora

Posted by jpluimers on 2018/10/15

I’ve used these myself:

There are many more listed in for instance these links:

IIPC OpenWayBack:

–jeroen

Posted in Internet, InternetArchive, Power User, WayBack machine | Leave a Comment »

TweeterID – Twitter ID and username converter

Posted by jpluimers on 2018/10/12

Especially HTC devices used to store part of the context information like this:

<HTCData><Twitter>id:11111111/friendof:00000000</Twitter></HTCData>

[WayBack] TweeterID – Twitter ID and username converter:

Convert any Twitter account’s username or @handle into its respective Twitter ID, or convert ID to username

You can also do the Twitter ID to @handle conversion by URL (at the time of writing, neither existed, which is intentional: replace your own ID there) [WayBack] permalinks – URL link to Twitter user with ID, not name – Stack Overflow:

I could not find a twitter URL that does the conversion the other way around.

–jeroen

 

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

Zamzar – video converter, audio converter, image converter, eBook converter – via @Matijn

Posted by jpluimers on 2018/10/12

Even for Geeks like me, this is a great on-line tool for converting media files: [WayBack/Archive] Zamzar – video converter, audio converter, image converter, eBook converter

Thanks Matijn for pointing me to this.

And for nerds there is ffmpeg:

for name in *.ogg; do ffmpeg -i "$name" -ab 128k -map_meta_data 0:0,s0 "${name/.ogg/.mp3}"; done;

–jeroen

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

Retr0bright – Wikipedia

Posted by jpluimers on 2018/10/12

For removing the yellowing of ABS plastics:

In addition to homemade gel mixtures, hydrogen peroxide-based hair bleaching creams available at beauty supply stores can also be used as a ready-made mix.

[WayBack] Retr0bright – Wikipedia

More background information:

–jeroen

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Posted in History, LifeHacker, Power User | Leave a Comment »

MotionEyeOS on Odroid C1+ with Logitech USB web cameras

Posted by jpluimers on 2018/10/11

Hopefully I get this to work after fixing

The first part of the fix was to

  1. re-image the SD card.
  2. boot
  3. wait 5 minutes (there is no output on HDMI apart from some flickering and no output on TTY using 115200 bits/second despite trying [WayBack] en:c1_hardware_uart [ODROID Wiki])

The second part is getting the USB web cameras to work.

I’ve got two types, but the label on them doesn’t list their common name, only their P/N sometimes with M/N:

  1. P/N 860-000049 M/N V-UBC40 (really old USB cameras)
  2. P/N 860-000334 (new USB camera)

The MotionEyeOS web interface didn’t list any working cameras so I had to do some digging.

Luckily [WayBack] Webcam software and driver support for Windows has a table of part and model numbers combined with product names, so they got revealed them as these:

  1. P/N 860-000334 = M/N V-U0028  with name HD Pro Webcam C920
  2. P/N 861225 = M/N V-UBC40 with name Quick Cam Messenger
    (which is funny as the P/N on the label is different)

Both are supported by motion according to [WayBack] Logitech < Motion < Foswiki though the Quick Cam Messenger needs [WayBack] Quickcam Messenger & Communicate driver for Linux which I should try to cross-compile one day.

The latter works fine. Below are some settings I used.

Read the rest of this entry »

Posted in *nix, Development, Hardware Development, Linux, Odroid, Power User | Leave a Comment »

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