Update Error: Wrong Architecture

Yesterday I ran into one of those mystifying glitches that, will infrequent, serve as a reminder that Linux is not for the faint of heart. When I booted my desktop system (Linux Mint 18.1 Serena), the system tray icon for the software updater was displaying a red “X” that indicates it tried and failed to …

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Adventures with TeX Live

Since I use the Linux Mint operating system, the obvious (if not only) choice for a LaTeX distribution is TeX Live. (If you are not familiar with, or are not interested in, the LaTeX typesetting system, you have already read too far in this post.) On Mint, Ubuntu and other Debian-type operating systems, you typically …

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Mapping Trackball Buttons

For years, I’ve used a Logitech M570 wireless trackball with my Linux Mint PC. I generally prefer trackballs to mice — no need to lift and reposition after a bunch of movement — and I find that using my thumb, rather than my index finger (or, if I’m in a bad mood, my middle finger) …

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Mint Upgrade Woes

As I mentioned a couple of months ago, I upgraded a laptop from Linux Mint 17.3 (“Rebecca”) to 18.0 (“Sarah”) with minimal difficulties. My laptop serves as a guinea pig for these things. Once I’m sure things work fine on the laptop, I’ll consider upgrading my desktop as well. A few days ago I finally …

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Surviving an nVidia Driver Update

Scenario: I’m running Linux Mint 17.3 Rebecca (based on Ubuntu 14.04) on a PC with a GeForce 6150SE nForce 430 graphics card. My desktop environment is Cinnamon. The graphics card is a bit long in the tooth, but it’s been running fine with the supported nVidia proprietary driver for quite some time. Unfortunately, having no …

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Mint Upgrade Problem Solved

I decided to upgrade first my laptop (the canary in the mine shaft), then my desktop (assuming the canary lived), from Linux Mint 17.3 (“Rebecca”) to 18.0 (“Sarah”). The “old school” approach would be to download the distribution to a CD/DVD, or create a bootable version on a USB stick, test it and then install …

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DNS on Home WiFi

DNS on Home WiFi Like a lot of people, I have a home WiFi network, and I recently changed my Internet service provider. That required replacing my cable modem. Both the old and new modems provided a DHCP service that doled out local IP addresses to devices connecting to the home WiFi network. Both modems …

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Connecting Bluetooth Headphones

I recently picked up a pair of Bluetooth headphones (Mixcder ShareMe 7) for use with my laptop (which runs Linux Mint). Getting them to connect properly was a bit of an adventure. After I had things (mostly) sorted out, I decided to script the steps necessary to get them working so that I could just …

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SOLVED: Problem with Impressive

I’ve written before (here and here) about using the open-source Impressive program to display PDF presentations. It’s been quite a while since I used it, or any other presentation software for that matter — retired geezers don’t do a lot of presenting — but I’ll be helping the INFORMS Student Chapter at the University of …

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Tale of the Loose Cable

Friday I used my laptop (Acer Aspire V5-131, Linux Mint 17.3) at a coffee shop with no problems. Saturday it wouldn’t boot. The specific error message was: Broadcom UNDI PXE2.1 v15.0.1 <blah blah blah> PXE-E61: Media test failure, check cable PXE-M0F: Exiting Broadcom PXE ROM No bootable device — insert boot disk and press any …

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Oracle Java 8 Update

For quite a while, I was getting security nags from Firefox every time a web site wanted to run a Java applet. Firefox would tell me I needed to upgrade to the latest version of Java. That would have been fine, except that I was already running the latest Java (1.8.0_66 as of this writing). …

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The rJava Nightmare

I like R. I like Java. I hate the rJava package, or more precisely I hate installing or updating it. Something (often multiple somethings) always goes wrong. I forget that for some reason I need to invoke root privileges when installing it. It needs a C++ library that I could swear I have, except I …

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Alternative Versions of R

Fair warning: most of this post is specific to Linux users, and in fact to users of Debian-based distributions (e.g., Debian, Ubuntu or Mint). The first section, however, may be of interest to R users on any platform. An alternative to “official” R By “official” R, I mean the version of R issued by the …

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An SSH Glitch

Something weird happened with SSH today, and I’m documenting it here in case it happens again. I was minding my own business, doing some coding, on a project that is under version control using Git. After committing some changes, I was ready to push them up to the remote (a GitLab server here at Michigan …

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Thunar Slow-down Fixed

My laptop is not exactly a screamer, but it’s adequate for my purposes. I run Linux Mint 17 on it (Xfce desktop), which uses Thunar as its file manager. Not too long ago, I installed the RabbitVCS version control tools, including several plugins for Thunar needed to integrate the two. Lately, Thunar has been incredibly …

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HDMI Audio in Mythbuntu

My adventure replacing my old Mythbuntu box with a new one continues. It’s been working for a while now, in terms of waking when it should, recording and replaying shows. Yesterday’s immediate concern was sound. The PC hooks to my TV via an HDMI cable. While both live TV and recordings viewed through MythTV worked …

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Updating Adobe Flash

Within the past week, give or take, Firefox started blocking the Adobe Shockwave plugin from running in web pages, due to a security problem with it. I could (and did, when I trusted the site) override the warning, but in general bypassing security is a bad idea. Even when the site is trusted, you have …

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Mythbuntu: The Upgrade from Hell

I foolishly let Mythbuntu update to version 14.04 overnight a few days ago. The installer ran into problems (which I could not decipher) regarding updating the MythTV database. I let it upload two separate bug reports and did my best to soldier on. When the installation was finally over, the back end would not load, …

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New Linux Laptop

Earlier this month I decided to get a netbook, and of course I wanted to run Linux (preferably Linux Mint) on it. After shopping around, I settled on an Acer Aspire V5-131. I won’t say it was my dream machine — it has a conventional hard drive, whereas I would have preferred a solid-state drive …

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Mint on a Stick

Due to a research project in which I’m currently engaged (and, trust me, you do not want to know the details), I find myself needing to wander into a public computer lab on our campus (where Windows rules the machines) and run a “virtual” Linux machine (because I’ll be talking to a Linux server and, …

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CP Optimizer, Java and NetBeans

After years of coding CPLEX applications in Java, I’ve just started working with CP Optimizer (the IBM/ILOG constraint programming solver) … and it did not take me long to run into problems. As with CPLEX, you access CP Optimizer from Java through the Concert API. As always, I am using the NetBeans IDE to do …

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Mint Petra Odds and Ends

As I complete (hopefully) the upgrade of my home PC to Linux Mint 16 Petra (which appears to be commensurable with Ubuntu 13.10 Saucy Salamander), I’m making notes on glitches small and large. I initially had some display problems booting and resuming from hibernation. By “display problems” I mean totally corrupted displays, or what appeared …

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