It has become a constant annoyance that every time I build a new Raspberry Pi, the thing which is the most difficult is doing updates. I have scripts written to set everything up, but the first thing the script does is attempt to update software. Before I even reach that point, the first thing the Pi itself does is ask to update software. And it always fails.
I think this may be because of where I live. I think that the Raspbian (now Raspberry Pi OS apparently) mirrors must have one locally that is unreliable, and it gives me that one.
Two things I need to do. One is that it tries to connect using ipv6, and fails. I have to tell it to use ipv4. So one thing I end up having to do is tell apt not to use ipv6:
echo 'Acquire::ForceIPv4 "true";' > /etc/apt/apt.conf.d/99-useipv4
The second thing is to change the location of the mirror. One can look up the mirrors at https://www.raspbian.org/RaspbianMirrors, and pick one nearby, and replace the entry in /etc/apt/sources.list.
I first tried to install Mac OS onto a VM back in 2010 or 2011 I think. I’ve come back to the task from time to time and have never been successful, but truthfully until recently all the virtual machines I’ve created on Cinnamon had been too slow to be useful anyway. Now that I have Cinnamon doing virtual machines well, I came back to the Mac – at the same time I was doing other VMs, and I didn’t keep careful track of what I did to get it up. This document is meant to record what I remember of what I did the first time, and then to do it again and keep better records.
Continue reading Installing Mac OS on KVM
When I tried to upgrade Cinnamon to Focal, I began to experience a lot of odd problems with VNC and GDM and the whole collection of machinery associated with getting a graphical environment particularly in a remote window. Cinnamon is physically downstairs in a rack in the basement, and my usual way of working is 80-90% ssh/command line and occasionally vinagre in an adjacent monitor with screens for a dozen or so places that I occasionally need to see graphically, including Cinnamon, but Vinagre usually stays pointed at Rosemary (also in the basement).
Continue reading Packagekit adjustments in ubuntu
Some people for whom I provide some kinds of support with gateway pis, use Macs. For the pc folk – at least for those on Windows 10, I’ve been seting up to do the filehistory thing, and putting the filehistory onto the /backup drive on the gateway pi. Then it gets sent here overnight. I wanted to do the same for the folks who have Macs, of which there are several.
Continue reading Timemachine on Gateway pi
After updating Arch today I found I could no longer mount usb storage devices – usb sticks. The log shows the device coming up, but then messages from MTP saying:
mtp-probe: bus: 2, device: 5 was not an MTP device
I have seen this before. It is irritating, I am doing something else, my head full of whatever it is, and suddenly usb sticks won’t mount.
Continue reading libmtp udev rules
Shot off my foot.
I was working on some scripts which I will use on some other people’s macs (my wife has a new macbook air, and there is another friend I need to do this for also). These are bash scripts to be run from the terminal, and are supposed to set them up so I can help them from afar. One of the things the script does is create a user for me to use. I guess I was kinda “practicing” the transfer of the script via email, and I thoughtlessly ran the script on my macbook. Oops.
It tried to create a user dee with command line tools, and there was already a user dee. This was in El Capitan (the latest my ancient macbook will run), and there seemed to be no safeguards against idiocy. It seemed to foul things up. I rebooted, user dee was hidden — it was partly the new one, partly the old one, it wanted to “repair” the keychain, but couldn’t. There were a bunch of question marks in the dock. It couldn’t run anything. It was a mess. I was able to get up under a different username, and I was able to make a good backup. But I couldn’t recover. So then, from this hole I was in, I started to dig myself in farther, aiming (so it seems) for the center of the earth.
Continue reading Another self inflicted wound
I don’t know if I actually know enough to write this post. But I want to record what little I do know about this.
The symptom is that my tarragondata volume on this system, tarragon, claims to be out of space. This is a btrfs volume, about which there are other posts. It contains most of the dynamic parts of the system. The root volume ‘/’ is very small, about 20GB. Just enough to install the Centos code and keep a few little things. The great majority of the information needed to run the system is symlinked out of /, which includes /home, mail, databases, websites and their data, the repositories, certificates, local scripts etc.
This is a 180GB disk, and it currently is running about 55% full, i.e. almost 100GB used. Among the information on this disk are snapshots of all the tarragondata, every night for 30 days. This isn’t disaster backup/disk failure backup (which is elsewhere), this is “operator error” backup.
A couple of weeks ago I began to experience a new kind of failure. In the middle of the night, suddenly this btrfs volume would report that it was out of space – usage 100%, although the amount of storage in use was, still the roughtly 100GB that it normally uses. It manifestly was not actually out of space.
Continue reading Out of space on btrfs
I’m an old guy, and I mostly use pretty old stuff, but occasionally I think I should migrate to more up to date tools. I’ve used svn for 20 years. I know I should have moved to git long ago. I have also been using Eclipse as an IDE since forever. I run on apache. My systems aren’t virtual. One of my main websites is still hand wrought in PHP, and another is using an ancient and obsolete version of zend framework which has been abandoned by Zend. I think of moving it, maybe to laravel, maybe even to ruby on rails.
This documents my effort to modernize, if only a little. This is a very uncomfortable process because there are times when I’m sure I’m going to foul up the running sites, and be unable to get them up, or that I’m not going to be able to fix the next bug that comes along.
Continue reading The working environment
Needed to install calibre on oregano, for a downloaded e-book. So, I found calibre in the Arch User Repository, AUR.
I’ve been using AUR a good deal, but I constantly forget what to do and have to look it up: copy the url for the git link, create a directory, git clone from the link. cd into the directory, non-root. Inspect the BUILDPKG for safety. Then:
Continue reading Arch Keys
I’ve commented in a number of previous posts that I have had an inordinate amount of trouble with Fedora, compared to other distributions I have used. There were also a few posts about my efforts with Arch. Now I am biting the bullet and declaring the move of my main daily work computer to Arch to have been completed. I have been running on Arch for a month or three, and there is no going back.
Continue reading Goodbye fedora