I am all over the place with links this week – some of them pretty far off the path. There’s a lot, too, so enjoy!
- Puctuation obscurantism, punctuation humor; I like it all. (via)
- Exporting your git repository. Found while looking for something else.
- I want CTRL-D at a terminal to make something like this to happen.
- Visual Representation of Regular Expression Character Classes. I like visual ways of classifying complex data.
- Speaking of which: Anatomy of Data. Not sure how I found it.
- Digital Files and 3D Printing – In the Renaissance? The title sounds a bit linkbaity, but the story of the 14th century map designed to be recreated with a graphing tool is pretty neat.
- Postgres: The Bits You Haven’t Found. Advanced/odd Postgres usage. (via)
- Breaking your arrow keys is the latest idea in improving Vim usage.
- PC-BSD is moving to a ‘rolling release’ format, and also using the new pkg tools that are also in DPorts. Historic details on this new setup are available.
- Fred, taking off.
- Ten hours with the most inscrutable game of all time. I like the idea of Dwarf Fortress more than I actually like playing it. I’m somewhat afraid of it. It looks like this sounds.
- That last comparison wasn’t necessarily fair, but it was fun.
- If I’m going to talk about music like that, I should link Ishkur’s Guide to Electronic Music.
- The Wizard of Pinball. I just want my own standup pinball or arcade cabinet game. Yes, yes, I know, MAME cabinet.
- Appropriately this week, “Ball Saved”, page 1 and page 2 of a 2-page comic about pinball.
- UnReal World, an Iron-Age roguelike. Apparently pretty brutal, and two decades in development. Runs on several platforms, but not BSD. (via)
- You Are Boring. Some of the ‘boring’ items made me laugh. (via)
- The first review of Michael W. Lucas’s Absolute OpenBSD, Second Edition is available.
Your unrelated link of the week: I’ve already been offbeat enough in this Lazy Reading; I don’t have anything else.
Constantine A. Murenin has put together a new man page resource for all the BSDS: mdoc.su. The options for shortened URLs are entertainingly diverse.
This week I will both post this on the correct day AND get the date in the title correct.
- An oldie but goodie. ENHANCE. This will make anyone who has done photo/video editing twitch. Check the author’s Tumblr for more supercuts. (indirectly via)
- Many people complain about regular expressions (and more recently), but they are an insanely powerful tool if you know them well. If you do, figure out this crossword. (PDF) (via)
- Followup on the first two links in that last item: xkcd drives a lot of traffic!
- If you are on Windows, you probably use PuTTY for ssh. It saves everything in the registry, which can occasionally mean losing all your configuration. There’s manual ways to save it, but there’s also PuTTYtray. (I’ve used portaPuTTY in the past, but it seems to be missing/no longer updated.)
- Actually, holy crap there’s a lot of variations/addons for PuTTY.
- That makes sense given how many terminal emulators there are, really.
- Why piping something off the Internet right to a shell isn’t a good idea. (via)
- Remember when the computer section in bookstores had books that involved programming? (unfair, I know.)
- “Don’t Be A Stranger“, musing on how there isn’t enough meeting strangers through the Internet any more. Here’s the odd thought I had while reading that article: I couldn’t pick most of the other DragonFly developers out of a lineup, but I’ve been working and talking with some of them for a decade.
- You could build Photoshop version 1 yourself – just substitute the original Mac libraries.
- Related: Photoshop is a city for everyone.
- Some of the oldest color film footage. Not the oldest,but possibly some of the earliest commercial film. Of course, the first thing filmed are young, attractive women. This is a re-occurring theme.
- Hey, a comprehensive year-end BSD roundup.
Your unrelated tea link of the week: Epic Tea House Server. Interesting just because of what he does and because I’ve never encountered tea from a samovar, though I’ve read of it. (via)
Wait, this is better! That previous link led to this film from an English chemistry professor about tea chemistry. At first I was just entertained by his hair and his accent, but when he put tea in a NMR spectrometer, I decided this was the best tea thing ever. Even better than Elemental!
Michael W. Lucas has put together a script for pulling a user’s authorized_keys file for SSH out of LDAP. It’s a very good idea, though he hints pretty clearly that he could use feedback/feedback – there’s already some in the comments.
Updates: from discussion in IRC about this sort of distributed authentication (maybe ‘authentication distribution’ is a better phrase): Tools like puppet or FreeIPA may also be useful. From seeing other conversations about this, it looks like there’s a lot of solutions to pick from, of varying difficulty, and none canonical. That’s both good and bad.
Pierre Abbat noticed that when using pkg_rolling-replace, his Python packages would fail to be built/replaced. This is because pkgsrc puts the version number into the name of the package, and he was moving from Python 2.6 to 2.7. OBATA Akio and Greg Troxel had suggestions/explanations.
If you have git installed, and you are trying to upgrade it, you may have problems. The scmgit-docs package dependency requires some DocBook files that aren’t always accessible. If you do run into this problem, there’s 3 separate options:
Based on this bug report on the recently updated m4, you may need to perform some extra steps to update m4 as part of a normal upgrade:
# cd /usr/src/usr.bin/m4
# make install clean
If you are a brave soul and have an IPv6-only DragonFly installation, there’s now a git mirror of DragonFly that is available on IPv6.
I could have sworn I noted it before, but as Venkatesh Srinivas points out, there’s a port of cpdup to Linux. Also, if you’re using cpdup to copy material out of a Hammer volume’s history, use the -VV switch.
Michael W. Lucas announced his next book will be about DNSSec, which is good. It’s also self-published, which I like to see. I don’t know if it necessarily makes him more money, but I like to see more exploration of this new way of publishing.
If you look at his announcement, there’s a link to something else: vendor-free SSL certificates. These are possible? That’s one of those things I didn’t even realize I wanted; having to deal with a certification authority is annoying.
This discussion of cryptographic hardware for FreeBSD may include hardware that would work for DragonFly too. Can someone verify?
Shopping! This is the big holiday shopping weekend in the US, and I usually put together something here.
- Buy an SSD for someone who doesn’t have one – including you if that’s the case. There’s better and worse SSDs out there, but you’ll get a speed benefit no matter what, and other bonuses are possible.
- The Tea Bag Buddy, which also comes in a color-changing version. Because tea.
- My perennial Science! suggestions: ThinkGeek, American Science and Surplus, Ward’s Scientific, Carolina, and United Nuclear, The Bone Room, and Skulls Unlimited.
- The Best of BSD 2011 and Last Year in BSD Security, from the BSD Magazine publisher.
- For more BSD, there’s always the orgs themselves. FreeBSD, NetBSD, and OpenBSD – no DragonFly, though there ought to be. Also, ISC.
- For lists of gifts, there’s the Verge Gift Guide, which has some interesting offshoots.
- Another long list: The Comics Reporter’s Shopping List.
If you have suggestions, please comment!
Sascha Wildner has added system management BIOS (SMBIOS) support, visible with kenv, from FreeBSD. Use it for getting things like the BIOS revision, system manufacturer, and so on. For example:
smbios.bios.vendor="Dell Inc. "
This may seem minor, but this can be very helpful when dealing with hardware you aren’t physically able to access.
The 3.2 release seems to have gone well. Who has tried the new USB support? I’m curious to see how it’s going.
- :syntax Off, about working without syntax highlighting. (via)
- The previous link led me to this .vimrc with by-line explanations. I never get tired of looking at these things, though I also never implement anything out of them.
- 102 FreeBSD Tips. It’s really the contents of the FreeBSD fortune file. Almost all these tips apply to DragonFly, too, and often the other BSDs.
- A tcpdump primer. Always a good tool to know. It’s not as easy to use as Wireshark, but it’s certainly possible to end up with access to tcpdump and not Wireshark, right when you really need to see what’s happening on the network. (via)
- An HTML5-based terminal in your browser. Displays images, runs vim, etc. All that technological growth since 1972 has come full circle to replicate an 80×25 screen again. (I kid; it’s pretty neat.)
- A 6-week cryptography course, free of charge.
- Nothing to do with this operating system, but: Robot DragonFly, an Indiegogo project. (via)
- When you’re young and getting paid to work on open source, you can be surprisingly naive. (via several people)
- I agree with this sentiment about Linuxisms coming from an OpenBSD developer. (via Tomaz Bodzar)
- Someone want to work on ssh-ldap-helper for BSD? It sounds like a very good idea.
- A bunch of free computer books. Ignore the Linux ones; there’s free books for Ruby/Python/Perl there. (via)
Your unrelated link of the week: This roundup of ultrarealist human sculpture. You’ve probably seen Ron Mueck‘s art before, at least.
A thread on pkgsrc-users@ reminds me: adding a specific line for bin-install will save time when rebuilding packages; pkgsrc will use existing binary packages instead of rebuilding from source when possible, when this is set. At least, I’m pretty sure that’s what it does.
- deadweight, “Find unused CSS selectors by scraping your HTML”. I’ve needed something like this for years. (via)
- The same sort of thing for pkgsrc: pkg_leaves. Worth running at least yearly, or at least before any significant pkgsrc upgrade. There’s no point in updating a package you don’t use or need.
- GNU Coreutils cheat sheet, plus the instructions to make it. There’s other cheatsheets linked in the article that may be useful.
- Compiler benchmarks, comparing gcc and clang versions. For a complete benchmark, I’d want to compare what number of programs build with each, too. (via ftigeot on #dragonflybsd)
- When ‘your mom’ and Unix jokes collide.
- Distraction-free writing with Vim. (via)
- Also, there’s a “Modern Vim” book on the way. Will it be good? I have no idea; I don’t know of any prior books by the author or who the publisher is. Those facts might help.
- For a known author and publisher, here’s a status report on Absolute OpenBSD, 2nd Edition. If you don’t know what a BOFH is from his last sentence, read the original stories.
- Quadrilateral Cowboy, a cyberpunk hacking game that actually involves non-boring programming and not just a pipe-matching game under the guise of hacking.
- While I’m linking to games, GUTS, sorta like Diablo but more… roguey? It’s turn-based. Also, an excuse to use the roguelike tag.
- 4 UNIX commands I abuse every day. Having done a fair amount of Perl programming, I am entertained by having side effects being the intended goal. Also, the author pays attention to what runs on BSD. (via)
- “Disks lie. And the controllers that run them are partners in crime.” Marshall Kirk McKusick describes just how hard it is to know when your data has really made it from memory to disk. (via)
Your unrelated link of the week. Dubgif. Random animated gifs and dubstep clips. Sometimes it doesn’t work, and sometimes it’s perfect. (via) If that’s too random, there’s also this .
I have such a surplus of links these days that I started this Lazy Reading two weeks ago.
Your unrelated comics link of the week: Elfquest, every issue ever. The dialogue is cheesy but the original art is fun, in a way that grabbed me when I read it at 10 years of age.
This was going to go into a Lazy Reading post, but then I realized it shouldn’t. Here’s the source: “A Tragically Comedic Security Flaw in MySQL” (via)
The short version: MySQL, compiled a certain way, will allow 1 out of 256 root login attempts to work no matter what. I was going to link to this for the startlingly large number of MySQL installations found allowing connections from the public Internet, which means breaking into any affected servers would be easy. Then I thought about it… I don’t see a my.cnf installed by pkgsrc for at least MySQL 5.1 by default.
To fix this for your own installation, put
in /usr/pkg/etc/my.cnf to disallow remote connections. I don’t know if MySQL on DragonFly from pkgsrc is vulnerable to the issue, but it’s a good idea to not allow remote connections to the database, and ought to be on by default.
Or just use Postgres, if possible.
I got to use the ‘roguelike’ tag again this week, which always makes me happy. Surprisingly, it’s not about… that roguelike.
- RSA encryption explained. (via)
- Someone from Google went to BSDCan 2012 and blogged about it. The takeaways are interesting, especially something I’ve seen elsewhere: “Don’t buy systems that can’t take registered RAM in a bazillion sockets”.
- Occam’s Razor applies here, but still: trust nobody. (via)
- Bash One-liners Explained, part 1.
- They’re switching from ‘cvs import’ to ‘cvs add’ in pkgsrc. Now if they’d just switch the ‘cvs’ part out…
- Not even vaguely computer related: Please won’t someone make these commercially available? Wait, someone did!
- The Mechanics and Meaning of That Ol’ Dial-Up Modem Sound. (via) I feel nostalgic, but on the other hand… nobody missed 14.4 kbaud.
- Advanced Vim Macros. “As is typical in Vim, the rabbit hole of functionality goes much deeper than most users will ever plumb.” (via)
- Also at the same place: Vim Koans.
- Hey, there’s a DragonFly page on the Wine Wiki. It’s short but probably very useful if you want to run Wine.
- Also, an OpenCV fix for DragonFly, pushed upstream by a pkgsrc developer. That’s always nice to see.
- Fish, a new shell with some nice features. (via) Does this compile on DragonFly?
- Found near the same place: a screen saver that auto-plays Angband. OS X only, unfortunately. There must be an easy way to do the same with xscreensaver.
- CLANG, but not the compiler. Watch the movie.
Your unrelated link of the week: I happen to work at a salt mining operation, which leads to some unique problems (more). Mining in the US is regulated by MSHA, which has been cracking down since the Upper Big Branch incident. MSHA issues ‘fatalgrams‘ every time a miner dies. MSHA also shows up on site as soon as possible, which means they are there taking pictures within a few minutes, with equipment still running. It’s essentially crime scene photos, and a little worrying; many of the deaths are of people around my age with similar experience.
So many links this week I’m already working on next week’s entry. Enjoy!
- git aliae so that you never lose work (part 2). (via) Aliae is the plural of alias?
- The Setup; people’s work environments. I’ve linked to it before, when nabbing links from Trivium, but I never realized how many people there were to look at. People like Chet Faliszek, Gabe Newell, ‘bunnie’ Huang, _why the lucky stiff, Lee Hardcastle, Joel Johnson, MC Frontalot, Derek Yu, Eric Meyer, Anil Dash, Jordan Mechner, Andy Hertzfeld, and Ryan North. There’s a lot more. If any of those names are unfamiliar, you should go look them up and be pleasantly surprised.
- How to use DragonFly to troll Amiga users. Funny/sad, like most trolling.
- One does not simply run Unicorn in DragonFlyBSD. Not sure what Unicorn is, but I feel bad that it crashed.
- Become a Vim Master By Learning these 30+ Key Bindings. Well, it’s vim, not vi, but oh well. It’s the standard list of commands that normally makes up articles like this, but I still look, in the hopes that I’ll permanently absorb another movement pattern and get that much faster.
- Which hashing algorithm is best for uniqueness and speed? (via) The colorized hash maps are a pretty interlude in a technical discussion.
- Speaking of Vim, here’s the M command, implemented for a web page. (via) The only better thing would be a vertical split screen view.
- End of a Fishing Expedition. Makes a good point about the recently-lost-by-Oracle lawsuit about copyrighting APIs: if that was possible, most Unixish operating systems, including BSD, would suddenly have legal problems. Also, the judge in the case apparently knows how to program, and actually established a point of law instead of shrugging and saying “These kids and their newfangled Internets confuse me.”
- CPU wars. (via) A trump cards game based on CPUs. Super-nerdy!
Your unrelated comic link of the week: Make Good Art. (via) The comic version of Neil Gaiman’s recent commencement speech, cause comics are more fun than video.
DragonFly has a page on updating pkgsrc, and so does NetBSD. I don’t think I linked to the latter before, but even if I didn’t, it’s still useful.
Michael Lucas has a writeup on how he debugged his RANCID setup. I link to it for the technical details, and also because if you have to manage more than a few switches or other network devices, RANCID is very useful.
- I like the sentiments here about Instagram. (via) I can see why it was popular, but not how it represented anything but a cosmetic tool, dependent on other services.
- Waxy.org turns 10. I relink (reblog? I don’t know) material from the links page on waxy.org, because Andy Baio has a keen eye. That article has links to various high points over the last 10 years, so it’s worth setting aside some of your time and looking at previous features. Come to think of it, he started that only a year before I started this Digest.
- Supercomputers installed at the Lawrence Livermore National Laboratory. All the way back to UNIVAC. (via swildner on EFNet #dragonflybsd) This picture is one of the more realistic I’ve ever seen about rack installation.
- RFC6540: IPv6 Support Required for All IP-Capable Nodes. (via) YES.
- The Story of BSD and Open-Source Linux, unfortunately incorrect, starting with the headline.
- 40 years on: Why Unix standards still matter. A brief note about the Single Unix Specification. There’s some implication that Unix was involved in the moon landings; was that the case? I didn’t think so, since at least a chunk of the moon landings predate Unix existing. (i.e. before the Epoch.)
- A photo followup on the one PHP article from last week. (via aggelos on EFNet #dragonflybsd)
- From the same site as the PHP article, tmux is sweet as heck. It’s nice to see the positive points of tmux defined outside of licensing. Also, it serves as a good tmux configuration checklist.
Your unrelated link of the week: One Thing Well. The BSD tag might be the most useful.
Based on a recent post from Chris Turner to the firstname.lastname@example.org mailing list, here’s a bug report that should get you to a working lang/OpenJDK7 pkgsrc package.
The links are all over the map this week, which is fine. Enjoy!
- This makes me laugh every time. (via)
- Etsy has an astonishingly good internal development practice. And open source code? (via)
- For contrast, Facebook’s release engineering process. (via I lost it, sorry) Not as interesting but I can’t tell why.
- Mosh, a program designed for the persistence of screen but differently. (via) Dunno if it builds on DragonFly, but it looks neat.
- “I just ran emacs. LOL!“
- 0x10c, a sci-fi game set in the future with spaceships running a 16-bit CPU. That you can program.
- I wish I could write here with the same mix of loathing and excitement found in this comics review. Warning: mildly… gonzo?
- The journey from user to contributor, a NYCBUG talk in mp3 form. (via)
- I’ve mentioned RetroBSD before, but here’s an example of it being installed on a Duinomite board. 2.11 BSD on a super-cheap, super-small Arduino-style board! (via) I don’t know what I’d do with it, but I want one. It even has keyboard and VGA ports.
- At some point, this CPU database will be handy. (via)
- A new, slow form of brute force ssh attack. (via) What I find interesting here is not so much the new attack itself, but Peter Hansteen’s careful gathering and analysis of data around it.
Your unrelated link of the week: memepool. It’s seen some activity lately. It was a blog before there were blogs, and I was part of it.
I’ve seen a few people complain about poor video performance in DragonFly, in Xorg. If you see a bunch of “contigmalloc_map: failed …” errors in your dmesg, your video card needs more contiguous memory allocated. Set vm.dma_reserved to 32M in /boot/loader.conf and you should be set. If that doesn’t work, try 64M.
Konrad Neuwirth is running Apache inside a jail, and getting some weird errors. Obviously I don’t know the fix, but Chris Turner knows what the settings need to be.
A tip for anyone who hasn’t tried this yet: run irssi in screen, and connect to #dragonflybsd on EFNet. You can then resume your screen session at any time after disconnecting and see the backlog, catch people addressing you directly, etc.
Before anyone says it: yes, I know, tmux works too.
I’m making sure I post this Lazy Reading on the right day. A nice full week’s worth of stuff.
- Bandwidth used when loading different web pages. (via) The largest one is also the most surprising.
- Do you have an IBM x3550? Turn ACPI off.
- The recent TCL presentation at NYCBUG is available in audio form.
- Did you want to know a lot of detail on how to do journaled soft updates in UFS? You want detail, you got it. (via, via) (Is that a repeat link? I don’t think so…)
- This is totally useful if you’re using ssh from a Windows machine.
- SSH is used as a noun and a verb, I just realized. No link, it’s just me noticing verbification.
- BSDCan 2012 registration is open. (via Michael Lucas’s Twitter feed) Conventions are awesome. You should go.
- Michael Lucas talks about book promotion with his recent book. There’s a graph, so it’s automatically great.
- Speaking of books, Modern Perl: The Book is free to download in PDF form.
- A story about _why. (via) I’m not so interested in his identity, but in what he did to get people to program.
- My git habits. (Not mine; that’s just the title.) Speaking of learning, I’ve always thought the next steps past learning the basics of anything is to then see how experienced people approach it, idiomatically.
- Why Juniper Gives Back to the FreeBSD Community. I link to this because I like what they are doing, and also because in a perfect world I would rather have a BSD-ish interface on my networking equipment than fiddle with IOS. Oh well.
- Bunnie Huang always builds neat stuff. This time it’s a Geiger counter. (via)
Your unrelated link of the week: Neo Scavenger. (via) It’s a game, in Flash, and in beta. If you like postapocalyptic survival, it may be for you.
Have you ever tried to run a service and realized you forgot to make an entry in rc.conf to enable it? It’s mildly annoying. There’s now a “one’ keyword (via NetBSD) that lets you enable a service, once. It still apparently performs sanity checks, unlike the otherwise-similar ‘force’ keyword.
That’s exactly what Michael Lucas talks about in this recent post; using ssh to browse from a different machine, but using a local web browser. He uses it to get around a network problem, but I imagine there’s a number of other applications. This is one of the valuable tips from his recent book.
Hello new DragonFly 3.0 users! This is my not-about-DragonFly weekend link roundup. I’ll be back to regular DragonFly-ish stuff tomorrow.
- Vim anti-patterns, Gnuplotting, and Computing History At Bell Labs. I’m combining what would normally be 3 separate points because I stole them all from Christian Neukirchen’s blog. I wish I had found them first.
- I mentioned Dungeons & Dragons last week, which led Michael Lucas to point out Dungeon Crawl Classics in the comments. Along that same theme, here’s some 70’s role playing game illustrations. (via) There’s a parallel between computing in the late 1970s and fantasy; expert programmers were called wizards, understanding computers was an esoteric art… I could develop the heck out of that thesis, but let’s just look at the pictures and feel nostalgic instead.
- And then everything got a lot more weird-looking, 20 years later! (via)
- Hey, that time zone lawsuit mentioned here before was dismissed. That’s good news. (via lots of places)
- Hyperpolyglot: Scripting. Look for your favorite scripting language and compare it side-by-side with others. (via ferz on EFNet #dragonflybsd)
- The text of the DragonFly 3.0 announcement gets copied around to a lot of sites, far more than I’m linking here. However, I found this one entertaining because it kind of makes it sound like DragonFly is just what I happened to come with.
- Custom 3D printing is becoming accessible enough that I’m trying to think of things I could get printed that way, even though I don’t need it. (via I lost it, sorry)
Your unrelated link of the week: Quigley’s Cabinet. Read her books if you have a fascination with old dead things.
Michael Lucas installed WHMCS, a commerical hosting management tool, on FreeBSD. He tells a story of doing so, and in the process happened to list all the PHP modules needed for it to run. I’m linking it because that list is going to come in useful for someone, someday.
If you were thinking about implementing DNSSEC, Michael Lucas did it himself and wrote down his notes. You can read them and either follow along to implement it yourself, or just spectate. The one disadvantage is that it uses BIND 9.9, and I only see 9.8 and 10 in pkgsrc.
Edward Berger found that using a LG/Hitachi DVD drive kept him from successfully booting a DragonFly install CD. Using other manufacturers worked out fine. What causes the problem? I don’t know, but it’s worth mentioning it out loud in case someone else gets bit by it.
I’m posting this because it will save someone (possibly me) an hour of aggravation someday. If you are updating Samba from version 3.0 or 3.3 to a later version, it’ll take your existing config but possibly silently break on user authentication.
If you install CUPS, or know that you will never print using lpr(1), you can make sure thatyour DragonFly system never builds lpr again by putting NO_LPR=true in /etc/make.conf.
What if you have a DragonFly system that you want to use for an wireless access point? Andrey N. Oktyabrski did, and he helpfully listed his solution.
I just mentioned DNSSEC in last week’s Lazy Reading, and here’s a “How to get DNSSEC with BIND 9.8.1 working” article from Michael Lucas. It’s pretty simple… Conveniently, BIND 9.8.1 is available in pkgsrc as net/bind98.
If you’re running DragonFly on a very low-end system, you may be wondering about memory requirements for Hammer. Hammer is much less RAM-hungry than ZFS, so it looks like you can get away with 128M, as long as you don’t mind the occasional error message. You can manually tweak settings for it if you like. 256M is plenty.
It still strikes me as odd to consider systems with less than 1G of RAM as “low-memory”. What rich times we live in!
There is now a NO_BINUTILS221 option, added by Sascha Wildner, that will keep your system from building binutils 2.21 during a buildworld. The system will still build binutils 2.22, so there will still be a functioning ld on the system. Use this along with NO_GCC41 (so only gcc 4.4 gets built) to speed up your buildworlds, if you like.
If you’re looking to use IPMI and remotely watch the console of another system, Matthew Dillon has made some changes to help with that.
Sascha Wildner has been using a new-to-me tool called coccinelle (no, not that) to scan for a number of problems. Patches for this tool may be useful for anyone else using coccinelle for bug-finding in other software.
If you’re running DragonFly in a virtual machine – specifically in VirtualBox, on Windows – there’s a recent thread on users@ that may have some tips, including a link from John Marino to tunnelier.
Getting close to 2.12 release…
Yep, fall hits and it’s easier to find links.
- DragonFly morphology. The insect, not the operating system, though that would make an interesting diagram.
- Stick your pinkie in the corner of your mouth, Dr. Evil style, and say, “One MEEELion TCP connections on BSD!“. (via several retweets)
- Sudo vs. SSH public keys.
- The app store concept is taking over. Not that it’s a totally bad thing! We could implement one for pkgsrc, and should. (via)
- A nice (OpenBSD-centric) walkthrough of routing. (via)
- Ooh, decent disk benchmarks. I wish there were graphs, of course.
- I think this happens to most CS grads; you sit around one day and say to yourself, “Hey, I could write an operating system!” This forum post shows someone getting that idea and then realizing it’s not necessarily the goal he wanted. Why do I link to it? I appreciate the optimism.
- Or you can just build a functioning computer in Minecraft. This sort of thing has been happening for a while – this movie is just a link to the craziest example I’ve seen so far.
Your unrelated link of the week: Scientific Illustration. Not a comic, but still visually interesting.
At some point, you may want to generate binary programs that are unstripped of debugging information. You may want to generate them with pkgsrc. Here’s a little note on what options will make that happen.
It’s almost the end of summer here, or at least the traditional end of summer in North America. About time, too! I don’t like the heat. Anyway, as people trickle back to school, some more interesting doodads should show up for these weekly Lazy Reading posts…
Your unrelated comic link of the week: Jack Kirby art on what would have been his 94th birthday. I have trouble communicating how dramatic and influential his art has been.
As part of a larger thread, Chris Turner went into a longer explanation of how PPTP connections work. Do you have PPTP working on DragonFly? Please share details!
If you’re committing something to DragonFly, or even just working on your own Git repository so as to submit a patch, the new-to-me-and-not-actually-secret committer(7) man page has a lot of tips. I’m linking to it because it holds a lot of information that otherwise would be something you’d have to soak up over time from the community, maybe.
Apparently, if you are running IPv6, and using radvd (Linux)/rtadvd (BSD) to autoconfigure your hosts with IPv6 addresses, you need to tell your DragonFly hosts to accept this.
Lazy reading is easy when it’s been this hot out. In fact, I may melt before this article gets published.
- Ecdysis – a NAT64 gateway program. I link to it for two reasons. 1: You will probably need to NAT 6-to-4 sooner or later, and 2: it uses PF and so is BSD-compatible. (via)
- Don’t not copy that floppy! (also via) My original Apple ][ disk for Castle Wolfenstein is probably no longer functional. Not that I have equipment to play it on…
- World timezones, as a visible map. (via) I mention time zone updates here on occasion, and this is a immediate guide to what a strange patchwork of zones it is. You can’t even see some of the really tiny/crazy ones.
- A crappy way to start your day. Nobody ever enjoys that call from work…
And now, a link that has nothing to do with this.
Background: You may remember some time ago, I posted a review of Michael Lucas’s Network Flow Analysis. He’s written several BSD books and so I figured it was worth reading further, knowing that this network-specific book would be BSD-friendly. Also, he made it easier by sending me a copy.
No Starch Press, the company that published all the books linked in the previous paragraph, asked if I’d read/review another book from them. This would be Practical Packet Analysis, 2nd edition. (Review continues after the break…)
I happened to stumble on this: the DuckDuckGo search engine will take you directly to a DragonFly man page, if you type ‘!dfman’ at the start of your query. For instance, “!dfman hammer“.
I didn’t think of this, but I needed it: if you have an older Hammer system that now can perform deduplication because you upgraded to DragonFly 2.10, make sure to add it to the configuration for that file system, or else it won’t run.
You can probably infer the new (to me) blog I found this week from some of the links…
- Adding IPv6 to a FreeBSD Mail/Web Server – from Michael Lucas, repeat BSD author. I link to this because we’re all going to have to do something similar in the next year or so, I bet..
- A visual guide to TMUX, part 1 and part 2. tmux has usually been introduced to me as “It’s BSD-licensed and not screen”, which is good, but not compelling on its own. The first of the articles linked here goes over the comparative differences in some detail. (via)
- Speaking of screen-ish things, do you leave an irssi session running in screen so that you can rejoin IRC conversations at any time? I sure do. Sometimes I even reconnect through ConnectBot on my Android phone. There’s now a Connectbot variation for irssi, just for people who do such a thing. Don’t forget: #dragonflybsd on EFNet.
- Also still on the topic: forgetting to use screen and then being stuck with a long-running process is lousy. There’s ways to deal with it, though. (via, from a blogroll link)
- Hey, it’s neat to see a new business built on BSD – OpenBSD, in this case: Tunnelr. (via)
- We’re still doing great in terms of pkgsrc packages building successfully on DragonFly.
- An hour+ recording of the recent NYCBUG meeting about BSD networking is online. (Link is to a MP3 – via)
- How not to comment code.
- AT&T -> BSD -> AT&T.
This is one of those scenarios that I’m noting because it might bite someone, some day: if your root partition is encrypted, you can’t fit in a different keymap. However, kernel options to build in a different keymap will fix this issue.
Normally I hold this for Sunday, but I’ve got a good batch of links already. Something here for everyone, this week.
- A git cheatsheet, and another git cheatsheet. I may have linked to the latter one before, as it looks vaguely familiar. Anyway, bookmark. (Thanks, luxh on EFNet #dragonflybsd)
- What should you do about bad blocks on a disk? Get a new disk.
- If you ever wanted to port software, there’s a pkgsrc developer’s guide (thanks Francois Tigeot) that shows you how.
- It’s NOT LINUX, for the billionth time. It’s BSD UNIX (certified, even) under there!
- “Children of the Cron“. An entertaining pun. (via)
- Nothing to do with BSD, or even computers, really: Gary Gorton, interviewed about the recent financial crisis, at a Fed bank website (!?). Interesting because I like economic matters, and because it’s the first web page where I’ve ever seen pop-up links added usefully, as a sort of footnote that you don’t have to scroll. (via)
- Michael Lucas recently had a machine broken into. Since everything on the machine is suspect, he’s using Netflow data to figure out when it happened, and how, which is not surprising given his most recent book. He has two posts describing how he backtracks his way to the probable source.
I never really noticed this before, but it’s possible to include your own patchsets into pkgsrc and have them picked up as part of the build process, using $LOCALPATCHES.
If you were dying to have less behave like more, it’s possible to do so with these tips from Oliver Fromme. I don’t know if it’s that desirable, but it’s an interesting thing.
Somehow I ended up with a zillion links for this week’s Lazy Reading. I hope you’ve got some spare time for this… Let’s get right into it:
- Michael Lucas, BSD book author (see links on site), has started Twittering. He’s also found the Wikileaks/NetBSD association that I didn’t know about, as Julian Assange even shows up in the NetBSD fortunes file. Also, while linking to his blog, I’ll point at his post on “Write what you don’t know“. Think of that article next time you feel you don’t know enough to contribute to something – especially open source.
- There’s a lengthy dialog on the email@example.com mailing list about pkgsrc, and “Making it easier to get and use pkgsrc“. You can follow the whole thread on the listing page. I am all for the idea. Everybody and their brother has an App Store these days. Ports/pkgsrc are perhaps the original app store ideas, and I’d like to see them brought to the same level as these commercial entitites. This is important: pkgsrc is perhaps the only app store equivalent in existence that is not tied to a platform; that exists only to get you software rather than to provide a way to tie a platform into its developers profits.
- Hey, a roguelike zombie apocalypse game! Aw, it’s Windows-only.
- Mikel King has an editorial that sums up the many places BSD serves as an underpinning to products – a good checklist, if you don’t know of them. He’s also written an instructional article on passwordless/SSH setup.
- Along the same lines, Promote Perl by Building Great Things. This applies to BSD products too; telling people it’s great doesn’t work as well as making something great and showing that a BSD system is part of what makes it so.
- Did you know there are even BSD Certification classes in Iran? I really need to do that… though probably not at that location.
- Yacc is not dead. (via) I link to this because I had a moment of nerd excitement realizing that blog’s title is intended to look like a bang path.
- Database design ideas. There’s been a good series of posts there lately, good for anyone wanting to move beyond the basic CRUD details.
I was reading this Perl Advent Calendar (that would be good for DragonFly, come to think of it) post about ack, and came across a interesting line:
curl http://betterthangrep.com/ack-standalone > ~/bin/ack && chmod 0755 !#:3'
fetch’ would work just as well on a BSD system. The interesting thing is that it’s a one-liner for installing software that doesn’t make any assumptions about having an existing framework like pkgsrc or aptitude or anything like that – it just grabs the code and plops it in place. It wouldn’t work for more complex software, but the simplicity is intriguing, to match the Unix-like single, chainable program idea.
For those who haven’t seen it, ‘ack‘ is a grep replacement that automatically takes care of common activities around searching – skipping files that would cause duplicate matches, binary files, etc., handles a larger range of regular expressions, and runs startlingly fast.
Siju George noticed that his mouse would stop working in X, perhaps every hour. Restarting X would fix it, but he didn’t have a clear cause. Antonio Huete Jimenez suggested turning the sysctl ‘debug.psm.loglevel’ to 9 to at least see what messages cropped up, and that seemed to fix it. I don’t think it’s a good long-term solution, but it’s worth mentioning in case this odd bug bites someone else.
Naoya Sugioka had trouble booting DragonFly on his Dell M4400. He updated ACPICA with this patch, and was able to boot. I link to it in case someone else with a recent Dell model (or perhaps just a laptop with the same chipset?) has the same issues.
A number of people have encountered this: while installing some larger pkgsrc package, the process stops on a strange DocBook error. Alex Hornung has a fix: symlink /usr/pkg/etc/xml/catalog to /usr/pkg/share/xml/catalog.
Alex Hornung is having trouble getting his power consumption as low as it could be on his DragonFly laptop. A side effect of this problem is that when he posts about it, he also manages to enumerate all the various ways you can reduce power consumption and heat usage on a laptop. (Follow the thread for more.)
If your system has trouble when APIC_IO is enabled, and you’re tracking DragonFly 2.9, you may have trouble on your next build. The fix is putting this in your loader.conf:
I know this has already been covered, to some extent, but one can never be too clear with solutions.
YONETANI Tomokazu wrote out a nice explanation of acpi(4) and the myriad ACPI subsystems which can be enabled or disabled at boot time. If you do have booting problems, it’s usually ACPI, and it’s usually only one small part. Finding that small part is easier with this list.
Something that always got with with Linux binary support was that I couldn’t get the Linux /proc filesystem to automatically mount on boot. I’d end up doing it by hand later, right after I tried to start a Linux binary and had all sorts of issues. Pierre Abbat had this same problem, and Sascha Wildner has the answer: “
linux_load=yes” in /boot/loader.conf.
When compiling software on DragonFly but outside of pkgsrc, and you have trouble with configure, remember you can always manually pull down new versions. You’re welcome, future me.
I’m linking to this commit message from Matthias Schmidt simply because it has the correct invocation for installing a vkernel, and I know this will come in handy, someday.
There’s a whole lot of options for bmake, used in pkgsrc, and they aren’t immediately obvious. I’ve linked to a reference before, but it’s no longer at that location. However, I found a new link!
Link dumps just so I can get caught up.
Using ‘serno’, meaning specifying disks by serial number rather than path, is a good idea. If you have a machine that started out as an older DragonFly installation, it may be a good idea to use this feature.
I apologize; I’ve been missing. Here’s some misc links while I get back in gear:
- A very good reason to be interested in Hammer over ZFS: nobody will threaten lawsuits over Hammer.
- 10 tricks for admins. I’m posting it cause I can never remember that thing with tunneling ssh out. (via)
- This Gaming Life, as a free download. An excellent book that is in physical form on my shelf right now. Yes, unrelated.
Sometimes, packages are renamed in pkgsrc, usually because of a version change. If that happens, it can be hard to find the replacement. You can manually add them, or there’s a trick to make the build ‘jump’ to the new name.