Someday you will need this – Page 7

2017/09/142023/07/09

Booting, UEFI, and text consoles

I installed a DragonFly snapshot on a Lenovo x220 last night. I went for a EFI install, even though the x220 has a “Legacy” option. When I booted, it looked like this:

It successfully booted, but once it hit the kernel load, it started printing to the top of the screen in that lovely repeating pattern you see.

Matthew Dillon helpfully pointed out that the DRM and i915 modules needed to be loaded. Hitting ‘9’ during the bootloader countdown got me to a prompt where I could type:

drm_load="YES"

i915_load="YES"'

kern.kms_console=1

menu

Which brought me back to the boot menu, but this time it loaded those additional modules to support the Intel video chipset – and it worked!

These lines can go in /boot/loader.conf for permanent use.

Update: accelerated X will need a different setup – see my later post.

2017/09/082017/09/08

Kabylake NUC and DragonFly

Matthew Dillon’s been using a Kabylake NUC for a DragonFly workstation and it’s generally working out well. It’s tiny enough to lose on a desk, in my opinion. He added performance details and a screenshot. The Specific Configs page has his notes, recorded, too.

Related laptop tip: If you have a Lenovo Yoga and can’t mount the drive after install, various sdhci modules may be the answer. Update: definitely the answer.

2017/08/302017/08/31

DragonFly and IPv6, getting online

Here’s a detailed writeup from Aaron LI on how to get a DragonFly system onto an IPv6 network.

Update: He also supplied an example pf ruleset that solved some IPv6 throughput problems for his VPS.

2017/08/07

New mechanism: kcollect

There’s a new facility in DragonFly: kcollect(8). It holds automatically-collected kernel data for about the last day, and can output to gnuplot. Note the automatic collection part; your system will always be able to tell you about weirdness – assuming that weirdness extends to one of the features kcollect tracks. Here’s some of the commits.

2017/07/252017/07/18

sshlockout and your logs

sshlockout(8) will now lock out based on number of attempts, just so that you don’t have huge logs of stubborn but stupid SSH brute force attacks.

2017/07/232017/07/21

Lazy Reading for 2017/07/23

I’ve got some esoteric stuff this week.

24-core CPU and I can’t move my mouse. The description of Amdahl’s Law is something not enough people realize. (via)
Pushing DNS into the Cloud.
Relive WW2 Lorenz decryption. (via)
books chapter four and books chapter five.
Build-from-a-kit mechanical keyboard, and odd but pretty controller. (via)
Nyan routing. (via)
Well Played vol 6,2 – european videogames of the 1980s. Free download of the issue. (via)
Everything You Always Wanted to Know About IPv6. Video from ARIN, so pretty authoritative. (via)
URLS are UIs. (via)
White Spots. The idea of using VR to visualize transmitter location is interesting. (via)
That’s a Big Microscope…
UNIX: How random is random? Depends on current operating system, which this article glosses over.
Visual Subnets. Click “How’s this work?” on the side if it’s not clear.
Introductory bullshit detection for non-technical managers. This is excellent for project planning overall, not just the BS part. (via)

Unrelated audio link of the week: Alan Lomax recordings are up on Bandcamp.

2017/07/10

DragonFly and a ThinkPad x230 TrackPoint

Bryan C. Everly eventually figured out how to configure his ThinkPad x230 so that the TrackPoint worked in xorg, and he wrote it down.

2017/06/242017/06/23

Ubiquiti Unifi and DragonFly

Should you need have Ubiquiti devices, and you need to get the Unifi management program running on your DragonFly server, this script will work for you. Some of the filepaths are different, but it’s otherwise complete.

2017/06/13

OpenVPN and compression

Matthew Dillon noted some OpenVPN problems, requiring him to disable compression. I don’t think this is a DragonFly problem, or even necessarily a BSD problem, but it’s worth mentioning in case you run it.

2017/06/042017/05/30

Lazy Reading for 2017/06/04

A lot of this was picked up during the previous long U.S. holiday weekend.

A Brief History of the ATM and As cash becomes quaint, are ATMs on path to obsolescence? (via)
The evolution of the laptop computer. Clickbaity and not comprehensive, but fun to look at the pictures. (also via)
A tip for catching process state changes.
The Pacification of the Nerd.
The forgotten joys of the screen saver. (via, of course)
Erdos-Bacon-Sabbath Numbers. (via)
Decalogue, by Jan Svankmajer. Svankmajer’s movie “Lunacy” is the most disturbing? distressing? film I’ve ever watched. (via)
Speaking of which, Svankmajer was an influence on the Quay Brothers, whom I was talking about with someone else recently. Surely you’ve seen Street of Crocodiles?
userland xnr jit.
open-adventure, the original, ported. (via)
Writing a Unix Shell. (via)
Compiler Optimizations are Awesome.
Tron B-Roll. Most evocative to those who remember computer graphics pre-texture-mapping.

2017/05/30

Trying UEFI and DragonFly

Andrew MacIntyre manually installed DragonFly onto a UEFI system, and conveniently he posted his notes. It includes a GRUB menu entry, which will come in handy for someone

2017/05/222017/05/24

Polling and how to try it

If your DragonFly system’s Intel network device doesn’t seem to pick up on DHCP, try turning on polling. This may already be a nonissue, but it doesn’t hurt to mention it.

Update: fixed.

2017/05/11

Bad network vs. pkg

A tip that might be useful for some readers: Mohammad BadieZadegan posted that he had a poor network connection, and so was having a hard time installing packages. If that bites you too, there are some pkg.conf options – starting with FETCH_TIMEOUT and FETCH_RETRY – that may help.

2017/03/052017/03/03

Lazy Reading for 2017/03/05

A little meta, this week.

Why Nothing Works Anymore. Occam’s Razor applies; most people undervalue design vs. cost. (via)
I miss Delphi
There’s more than one way to kill a Unix process
Sniffing out Unix processes using pgrep
cloudbleed hero graphics. You know what Cloudbleed is, correct? It’s hard to illustrate, is what it is.
1000 links later. The Digest is generally a links site, and my experience matches what he’s saying.
The PDP-10 group on GitHub. (via, via)
Doing Presentations. I have an employee who can’t stop reading text verbatim off his slides, facing the screen… which means I can’t stop falling asleep at about slide 20 or so. (via)
An annotated digest of the top “Hacker” “News” posts. Accurate. (via)
./code –poetry. (via)
Learning from Terminals to Design the Future of User Interfaces. (via)
comment free codex. Comment quantity is starting to matter even more than quality.
There’s no IPv4 ranges left to allocate, but there’s some ranges that aren’t being used by their owners, and are given back. Here’s where the remaining scraps of recovered IPv4 space are tracked. It at least delays the inevitable. (via)
Eli5: What is POSIX?
A time-proven zsh prompt.
About the Newton MessagePad 2xxx ROM card. (via)

Your unrelated tea link of the week: In Sri Lanka’s Tea Paradise, A Social Enterprise Is Brewing. I actually heard about the quality of the tea (very good) before I heard about the way the company was formed. Consider where your next tea purchase comes from, in light of this.

2017/02/212017/02/19

DIY RSS feed reads

Here’s one of the reasons to have your own permanent server: The New York Times has a daily feature called, not surprisingly, “The Daily“. It’s a short 15-20 minute news segment, ready by 6 AM. It’s available through Google Play Music or iTunes, but I leave for work by 6:15, and I don’t want to use up cell data downloading something that should arrive on my phone just before I leave the house. Of course, there’s no obvious way to tell Google Play, “I know it’s there; go get it right now”. I don’t know the iPhone experience, but I imagine it’s the same. I want to download on my time, not on Google or Apple’s schedule.

Luckily, there’s an RSS feed for this podcast. That, plus this simple script on my DragonFly system, means I can pull it down whenever I’m ready:

fetch -o – http://feeds.podtrac.com/zKq6WZZLTlbM | grep enclosure | cut -d ‘”‘ -f2 | xargs fetch -m

So, it’s a matter of running that script, and syncing off my own local storage, on my own schedule. FolderSync Lite will happily sync back to my phone using sftp.

2017/01/23

Vkernels: when to use them

The question of using vkernels(7) in a manner similar to jails pops up time and again, and the answer is, unsurprisingly, “it depends“. It looks like when you want to isolate greedy programs, vkernels are the way to go.

2016/12/12

syscons screensaver tip

I mention this because people don’t realize there’s a console screensaver: ‘vidcontrol -t XX’ will blank the console after XX seconds of inactivity. This way you aren’t lighting up your server closet with a terminal screen, forever.

2016/11/30

Odd options: console color

Did you know you can set the border color for the system console? I didn’t. syscons(4) lists a number of options, including scrollback length and some other features I never thought about changing.

2016/10/27

net.inet.carp.setroute and what it does

If your DragonFly machine is using CARP, and you don’t want CARP messing with your default routes, the sysctl net.inet.carp.setroute can keep them from being changed.

2016/10/20

em(4), re(4), and network issues

If you are using em(4) or re(4) devices for networking, you may want to turn on polling. MSI may or may not help for re(4), along with switching to the emx(4) driver.