Category: Technical

  • EAGTAC MX3T-C Review

    I recently bought an EAGTAC MX3T-C LED torch. This is a review of it. For technical details see http://www.eagtac.com/product/mx3t-c.

    First up, it gives an excellent light, which after all is its main purpose. The beam is very clear and clean on all settings – no dark rings or dim patches. On the brightest setting, the range is allegedly half a kilometre, and I can believe that. However, most of the time I don’t need the brightest setting; the two lowest ones are fine for my everyday use.

    The controls are simple – one button turns the torch on at the lowest setting; consecutive presses cycle through the brghtness settings (five in all). The second button turns the torch off if it is on, or on (at the brightest setting) if it is off. The second button can also be used to flash the torch – any press longer than (I’m guessing) half a second acts as a momentary on, and releasing the button turns the torch back off. Double-press it and you get a strobe light! Not that useful for me, but you never know… Finally there is a tailcap button, which works exactly like the second button.

    The build quality seems superb. The whole thing looks and feels really well-constructed, though it does take a bit of effort to get the tailcap off and on. But you want a tight fit if the thing is to remain waterproof.

    The belt holster is very solid, suitable even for wide belts, and grips the torch firmly. You would have to be upside down for the torch to fall out, and even then probably not unless you thumped the holster.

    Some niggles:

    On full brightness the body of the torch gets very hot, to the point where it becomes difficult to hold. This is a disadvantage of the short barrel, but is only an issue if you are using the higher settings for longer periods. On the lower settings the heat is no problem.

    The tailcap switch – which is probably only there so they can call the torch “tactical” 🙂 – is a bit pointless on a torch this chunky.

    Good though it is, the holster probably should have a strap so that the torch cannot fall out, even if you are upside down. And a clip as well as the belt loop would make it easier to use the holster casually.

    The torch would benefit from having somewhere to attach a lanyard – a suitable slit in the tailcap and maybe a metal loop attached where the tripod fitting goes. When holding it in your hand there is no room for anything else.

    The torch has no flat spots on the casing, so it rolls easily when put down on any surface.

    It doesn’t come with a charger; you can use any 2A USB charger though, and these days most people have plenty of those.

    These are all minor issues; overall this is a good torch at a good price. I plan on getting a small tripod so that I can use it as a floodlight if I need to.

    See also this article 🙂

  • Restarting Discord in Ubuntu after unsuspending

    (Update 2025: Sometime in the last year, Discord stopped dying after unsuspending. So I’m not using the technique in this article any more. Actually, I’m not using Discord any more 🙂 But the solution used might come in handy in other contexts, so the article remains.)

    Discord does not survive suspension on Ubunu Linux (20.04, anyway). This has been the case for several Discord versions now. Searches suggests that it is stumbling on something in the NVidia drivers when the system wakes up. Here’s a solution that doesn’t stop Discord dying, but does restart it automatically it when you unsuspend.

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  • Why sharing passwords is a Very Bad Idea

    I think the following policy should apply to company user accounts (not personal ones like Facebook or Google accounts, but accounts at workplaces). The bigger the workplace, the more important these are:

    1. Access should be given to named individuals only.
    2. Account names should be based on individuals’ names.
    3. Credentials should not be shared.

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  • A clean Firefox profile every time

    Sometimes, you need a fresh Firefox. One that is exactly as if you had just installed it. Nothing cached, no cookies, clean. Or perhaps you use different Firefox profiles, for different purposes, and don’t want to have to install all your favourite extensions and configuration changes every time you create a new profile. This post describes one way to achieve both those things. While this post tells how to do it in Linux, you could certainly adapt the methods for Windows or whatever. All you need is Firefox, a way to start it, and a scripting language.

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  • Using Firefox profiles in Ubuntu Unity

    As described in another post, I use Firefox profiles to keep various activities separate – different banks, different AWS accounts and so on. It’s easy enough to use them from the command line, but it is much nicer to just click on an icon and have the right profile start up. Here is how to do that for one window manager, Ubuntu’s Unity.

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  • Using Firefox profiles

    Out of the box, all your Firefox windows share resources between them. Even with so-called “private browsing” enabled, a lot of what you do is shared between your Firefox tabs and windows. I often want to be logged into Amazon AWS in several different accounts at once, but even if I do that in different tabs or even in different windows of the same browser profile, I can only use one account at a time. All the windows and tabs magically track the most recent login. The answer is to use more than one profile.

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  • Response to a bad article on My Health Record

    Dr Stephen Duckett of the Grattan Institute wrote a particularly poor piece on the My Health Record system. His article is available here:

    https://www.futurehealthindex.com/2018/11/07/case-study-what-can-we-learn-from-australias-my-health-record-experience/

    This post is my response, lightly edited with some footnotes added.

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  • Accessing network shares from Thunderbird

    Thunderbird in Linux, for some reason, still does not understand GIO filesystems. If you have a network location connected in your file manager (such as Nautilus) you can browse around, copy files and so on – but Thunderbird cannot see those locations. In particular, it can’t attach files out of those locations, not can it save attachments to those locations. Luckily, gvfs provides a workaround.

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  • AWS MFA QR Code tool

    As someone with administrator responsibilities on several AWS accounts, I have MFA (multi-factor authentication) enabled for lots of AWS identities – SSO logins, IAM users and root users. I use a virtual MFA device – i.e., a mobile phone running Google Authenticator. The QR codes that AWS displays when activating MFA have some irritating properties…

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  • Ode to a ThinkPad T30

    Way back in 2003, I bought a ThinkPad T30. Yesterday, July 10 2017, I turned it off for probably the last time.

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