The Wiert Corner – irregular stream of stuff

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

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Archive for January, 2018

When clonezilla shows “overlayfs missing workdir” during boot, then hangs

Posted by jpluimers on 2018/01/22

Clonezilla is a nice partition cloning tool, but sometimes booting it just gives you this message on the screen:

overlayfs missing workdir

As it’s the first message during boot, searching for clonezilla “overlayfs missing workdir” returns no meaningful results towards the top of the list.

From what I could trace back from the search results is that somewhere before 2.4.x this started to happen in the “stable” branch.

There are actually two branches that in practice are stable on the http://clonezilla.org/downloads.php:

  • alternative stable (which doesn’t have a version number but a YYYYMMDD date followed by -yakketty)
  • stable (which has a version number)

I think because of the naming, people usually start downloading the stable version. That doesn’t boot on most of the physical and virtual machines I’ve tried.

In my experience however, alternative stable doesn’t suffer from the overlay missing workdir issue on all the physical and virtual machines I’ve tried booting it with so far.

So I did some digging:

  • alternative stable is often referred to a alternative but it’s an Ubuntu-based branch running the same clonezilla software as the stable branch
  • stable is the Debian-based branch.
  • Ubuntu is based on Debian but Ubuntu releases in a much faster pace than the release frequency of Debian Stable.
  • Ubuntu has support for more recent hardware than Debian

TL;DR: Use alternative stable when stable fails to boot.

–jeroen

Posted in *nix, Debian, Power User, Ubuntu | Leave a Comment »

How can I reset a PC if I forgot the administrator password? – The Old New Thing

Posted by jpluimers on 2018/01/22

What I reboot three times is true.

[WayBackHow can I reset a PC if I forgot the administrator password? – The Old New Thing:

There is an emergency reset button that you can activate like this:

  • Turn off the computer.
  • Turn on the computer, but while it is booting, turn off the power.
  • Turn on the computer, but while it is booting, turn off the power.
  • Turn on the computer, but while it is booting, turn off the power.
  • Turn on the computer and wait.

After three failed reboot attempts, Windows goes into recovery mode and one of the options there is to reset the computer. One of the reasons for that option is to address this specific problem of finding an old machine that you forgot the password to, and you want to just reset the PC and start over clean.

–jeroen

Posted in Development, Power User, Software Development, The Old New Thing, Windows, Windows Development | Leave a Comment »

Notifications – Google+

Posted by jpluimers on 2018/01/20

As I keep forgetting the Notifications – Google+ URL and G+ kills “older” notifications: https://plus.google.com/notifications/all

–jeroen

Posted in G+: GooglePlus, Google, Power User, SocialMedia | Leave a Comment »

openSUSE – Review of the week 2018/03 – Dominique a.k.a. DimStar (Dim*) – be sure to review your openssh config!

Posted by jpluimers on 2018/01/20

Before upgrading Tumbleweed this week, you need to review your openssh config.

This is not mentioned in Review of the week 2018/03 – Dominique a.k.a. DimStar (Dim*), but very important.

So be sure to read these before upgrading:

If you forget to review /etc/ssh/sshd_config, you get this in journalctl if you have specified your own MACs for instance when hardening according to [WayBack including rimemd160] Secure Secure Shell:

Read the rest of this entry »

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

Installing A Maccon Card In A Macintosh Se/30 – Asante MacCon Family Ethernet Network Cards For The Macintosh Installation Manual [Page 29]

Posted by jpluimers on 2018/01/19

To get started:

Pictures, binary driver image from Index of /pdf/apple/nubus/asante/MacCon_SE30

Index of /pdf/apple/nubus/asante/MacCon_SE30

[ICO] Name Last modified Size Description

[PARENTDIR] Parent Directory
[   ] 5000118-00-01.BIN 2018-01-11 10:16 16K
[IMG] Asante_MacCon_SE30_1.JPG 2018-01-10 14:24 545K
[IMG] Asante_MacCon_SE30_2.JPG 2018-01-10 14:24 418K
[IMG] Asante_MacCon_SE30_3.JPG 2018-01-11 10:17 573K
[IMG] Asante_MacCon_SE30_4.JPG 2018-01-11 10:17 543K
[IMG] Asante_MacCon_SE30_5.JPG 2018-01-11 10:17 439K
[IMG] Farallon_SI_A_Series_b.JPG 2018-01-11 10:17 438K
[IMG] Farallon_SI_A_Series_f.JPG 2018-01-11 10:17 637K

Apache/2.4.18 (Ubuntu) Server at bitsavers.trailing-edge.com Port 80

 

–jeroen

Posted in Apple, Classic Macintosh, History, Macintosh SE/30, Power User | Leave a Comment »

mtr does ping and traceroute in one go – bold/red lines are for non-responding hosts

Posted by jpluimers on 2018/01/19

I learned about mtr via [WayBackBufferbloat Demystified – Andrew Clunis which I found via  [WayBack] Älterer Artikel, der Bufferbload und https://en.wikipedia.org/wiki/CoDel erklärt. – Kristian Köhntopp – Google+

mtr is cool:

mtr combines the functionality of the ‘traceroute’ and ‘ping’ programs in a single network diagnostic tool.

Running it, I saw occasional bold lines that were not mentioned in the README, but after a search in the repo I found it to be in documented NEWS:

Draw names in red (GTK) or bold (Curses) if host doesn’t respond.

Some times from here across to California back when I still had ADSL:

Read the rest of this entry »

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

Microsoft guided walk through to Fix Windows Update errors

Posted by jpluimers on 2018/01/19

This one helped me to fix a 0x80243004 error: somehow the virtual network adapter didn’t work well and a reboot worked.

Use our guided walk through to help you resolve Windows Update issues using the error code you got while updating your version of Windows.

Source: Fix Windows Update errors

–jeroen

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

Backreaction: Pure Nerd Fun: The Grasshopper Problem

Posted by jpluimers on 2018/01/18

For the love of math and physics science [WayBackBackreaction: Pure Nerd Fun: The Grasshopper Problem.

Background material and videos:

–jeroen

Read the rest of this entry »

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

Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.

Posted by jpluimers on 2018/01/18

On my list of things to try out when I need to use regular expressions again:

Test your regex by visualizing it with a live editor. JavaScript, Python, and PCRE.

Source: Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.

Via: [WayBackSergiu Toarca answering [WayBackRegex lookahead with multiple negative conditions – Stack Overflow

Note: in January 2018, Debuggex was down for a few days (Thanks Uwe for bringing that up and giving the below alternative [WayBack]).

If you are on Windows and are OK with a small cost, try this instead: [WayBack] RegexBuddy: Learn, Create, Understand, Test, Use and Save Regular Expression

–jeroen

Posted in Development, RegEx, Software Development | Leave a Comment »

Poor mans C to Delphi converter by Wouter van Nifterick

Posted by jpluimers on 2018/01/18

Seems very OK for a first pass in a C to Delphi conversion:

[WayBack] Hi, I’ve created a C to Delphi converter.Because it’s been so useful to me that I’ve decided to share it.It converts C code as-you-type, and it keep… – Wouter van Nifterick – Google+

Source is on GitHub: https://github.com/WouterVanNifterick/C-To-Delphi

–jeroen

Read the rest of this entry »

Posted in C, Delphi, Development, Software Development | Leave a Comment »