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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Is the era of management over? | World Economic Forum

Posted by jpluimers on 2018/01/12

Hopefully the next few years will finally show what the incremental software development and evolutionary management has been trying to advocate since the late 1950s and 1970s: hierarchies do not work and purpose works better for the vast majority than being in a triangle.

The first slide below is from Thoughtworks who has been doing these changes for several decades now.

Traditional hierarchies are giving way to more open and creative workplace cultures.

[WayBack] Is the era of management over? | World Economic Forum

That’s the only way to cope with complexity as talent dilutes in growing organisations.

Via:

–jeroen

Posted in Agile, Development, LifeHacker, Power User, Software Development | Leave a Comment »

Reminder to self: Sort out empty (zero size) Icon? files in Google Drive folder on OS X and Windows

Posted by jpluimers on 2018/01/12

It looks like when syncing folders between Mac OS X (MacOS X?) and Windows, many directories get empty Icon? files have a size of 0 bytes.

None of these directories had custom icons, so I’m inclined to remove them all from the Google Drive folder:

find . -name 'Icon*' -size 0 -print0 | xargs -0 rm

as [WayBack] Didier Trosset answered at [WayBack] How to delete many 0 byte files in linux? – Stack Overflow

Before I do that, I need to read these in more detail:

–jeroen

Posted in Apple, Google, GoogleDrive, iMac, Mac, Mac OS X / OS X / MacOS, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, MacMini, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User | Leave a Comment »

Proxmox – recovering a Windows 7 machine having “Missing operating system”

Posted by jpluimers on 2018/01/12

This is not what you like when you reboot a VM in Proxmox:

Booting from Hard disk...
Missing operating system

Booting from Hard disk... Missing operating system

Booting from Hard disk… Missing operating system

This case was a Windows 7 UK Professional x64 SP1 virtual machine.

Luckily the ISO is at https://archive.org/download/en_windows_7_professional_with_sp1_x64_dvd_u_676939_201606/en_windows_7_professional_with_sp1_x64_dvd_u_676939.iso via https://archive.org/details/en_windows_7_professional_with_sp1_x64_dvd_u_676939_201606 (later I found out I had the image in my backup vault as well).

I put that one in /var/lib/vz/template/iso so proxmox will automagically provide it in the local storage of iso images.

Now for some screenshots some based on what I learned at [Archive.is] How to use System Recovery Options for repairing Windows Vista or 7 installations:

Read the rest of this entry »

Posted in Power User, Proxmox, Virtualization, Windows, Windows 7 | Leave a Comment »

badssl.com

Posted by jpluimers on 2018/01/11

I wish I had bumped into this when it got released in 2015: [WayBack] badssl.com hosted in the cloud and maintained by two people from Google and Mozilla.

Where ssllabs.com is for checking server-side certificates, this one is for checking clients against many, many (did I already write MANY?) server side configurations both good (with a varying set of security settings like cyphers and key exchanges) and bad.

One of the bad ones is expired.badssl.com which your clients should not be able to connect to without throwing a big error.

Sources are at [WayBack] GitHub – chromium/badssl.com: Memorable site for testing clients against bad SSL configs.

Before using, please read their

Disclaimer

badssl.com is meant for manual testing of security UI in web clients.

Most subdomains are likely to have stable functionality, but anything could change without notice. If you would like a documented guarantee for a particular use case, please file an issue. (Alternatively, you could make a fork and host your own copy.)

badssl.com is not an official Google product. It is offered “AS-IS” and without any warranties.

–jeroen

Posted in Communications Development, Development, HTTP, https, Internet protocol suite, Security, Software Development, TCP, TLS, Web Development | Leave a Comment »

ACME TLS-SNI-01 validation disabled due to vulnerability – Incidents – Let’s Encrypt Community Support

Posted by jpluimers on 2018/01/11

Now that so many sites depend on LetsEncrypt: maybe it is time for a second one.

We’ve received a credible report of a problem with ACME TLS-SNI-01 validation which could allow people to get certificates they should not be able to get. While we investigate further we have disabled tls-sni-01 validation. We’ll post more information soon.

Source: [Archive.is] ACME TLS-SNI-01 validation disabled due to vulnerability – Incidents – Let’s Encrypt Community Support

Via:

–jeroen

Posted in Encryption, Let's Encrypt (letsencrypt/certbot), Power User, Security | Leave a Comment »

A way to bypass a Chrome interstitial page is to type a secret keyword…

Posted by jpluimers on 2018/01/10

Some sites do not have their TLS security set- up correctly. You can get around the page that Chrome then displays. This is called the “interstitial bypass”, you should use it with great care (not like one of the sites I visited a year ago that got themselves a nice ransomware attack), for instance on machines you can dispose off.

The mechanism has changed over time, from a simple button to a passphrase that changes every now and then.

Some historic links on this:

Via:

A way to bypass a Chrome interstitial page is to type a secret keyword. Until today, this not-no-secret keyword was “badidea”. And it just changed. So h… – François Beaufort – Google+

–jeroen

Read the rest of this entry »

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

SSLLabs security reports for some embarcadero subdomains

Posted by jpluimers on 2018/01/09

I hope this is a coincidence. Before Nick Hodges left, the TLS security of the various embarcadero https servers was increased, most from grade F. Now they might soon be grade F again.

Hopefully somebody in IT has time to take a renewed look as security needs constant attention.

community.embarcadero.com

community.embarcadero.com

edn.embarcadero.com

edn.embarcadero.com

forums.embarcadero.com

forums.embarcadero.com

members.embarcadero.com

members.embarcadero.com

quality.embarcadero.com

quality.embarcadero.com

store.embarcadero.com

store.embarcadero.com

www.embarcadero.com

www.embarcadero.com

I’ve only included a fraction of their sub-domains, as really this is a job for the Embarcadero IT department.

Related:

Posted in Encryption, HTTPS/TLS security, Power User, Security | Leave a Comment »

Zabbix: better “Disk space usage” graphs for Windows systems

Posted by jpluimers on 2018/01/09

The default [WayBack] Zabbix Disk space usage graph (named Disk space usage {#FSNAME}) for Windows looks like this:

Total disk space on C:

Total disk space on C:

What I want is a graph over time. Based on that, I can start working on different triggers than the default “less than 20% free space available“, for instance:

So I want graphs similar to the CPU load (in the graph itself called Processor load) graph which looks like this:

CPU load (a.k.a. Processor load) is actually graphed

CPU load (a.k.a. Processor load) is actually graphed “over time”

It is part of the Graph prototypes for the Template OS Windows discovery list Mounted filesystem discovery:

For now I’ve added this graph prototype as Line chart with 95th percentile:

If that work, I can start working on the triggers:

–jeroen

Posted in *nix, Monitoring, Power User, Zabbix | 2 Comments »

Bol.com E-waste: recycling old electronics

Posted by jpluimers on 2018/01/08

I know Dutch electronics companies are obliged to provides this service, but bol.com makes it really easy:

Lever je oude apparaat kosteloos in bij bol.com en wij verwerken het op een milieuvriendelijke manier. Zorg ervoor dat het klein elektrisch apparaat geen vloeistoffen en vetten meer bevat. Verpak het tot een stevig pakket en vermeld het bestelnummer van je nieuwe artikel in de linkerbovenhoek en onderstaand adres:

Bol.com E-waste
Antwoordnummer 2002
2130 RH Hoofddorp

–jeroen

Posted in LifeHacker, Power User | Leave a Comment »

Chrome on Mac OS X keeps all old versions it ever installed…

Posted by jpluimers on 2018/01/08

Like many, I’m a digital packrat. Somehow all your storage space somehow becomes full over time. But sometimes that’s not because just you are a digital packrat. Applications can be digital packrats too.

Chrome is such an example as on Mac OS X it will keep every prior version filed under /Applications/Google Chrome.app/Contents/Versions. In my case GrandPerspective showed it as one big blob of close 20 gigabyte. Which is odd as the download itself is was slightly short of 20 gigabyte of Chrome versions.

There are various ways to clean up this by script, but I find the easiest to do this in Finder:

  1. From Grand Perspective, right click the entry, then choose “Reveal in Finder”
  2. In Finder, right click the entry, then choose “Show Package Contents”
  3. In Finder, with the expanded “Contents” folder, browse to the “Versions” folder and expand it.
  4. From Finder, delete unwanted versions.

–jeroen

References:

Posted in Apple, Power User | Leave a Comment »

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