Why not?

Savaitės daina #3

2006-07-01T17:09:00.000+03:00

$ cat /etc/motd

Savaites daina:
Snow - Informer

Geros dienos.

Esi nepataisomas kompiuterastas, kuomet...

2006-06-28T11:39:00.000+03:00

...versdamas kilometrus į metrus, skaičių bandai daugint iš 1024.

P.S. Man šiandien taip nutiko...

Link of the day

2006-06-22T14:47:00.000+03:00

Žinau, žinau... Kažkada žadėjau, jog nebebus čia "link of the day" tipo nesąmonių. Tačiau šiandien netyčia užkluptas video man taip patiko, kad kažkaip ir nuodėmė būtų jį palikt likimo valiai :) Be to, techniškai tai jau ir nevisai linkas, kadangi embedded objektą galite rasti žemiau. Tai gal daugiau aš jau ir nerašysiu nieko, gero žiūrėjimo :)

Dvigubas invalidas

2006-06-12T09:53:00.000+03:00

Bent jau taip aš suprantu tokį parkavimosi būdą :)

Savaitės daina #2

2006-05-26T08:56:00.000+03:00

$ cat /etc/motd

Savaites daina:
Ini Kamoze - Here comes the hotstepper

Geros dienos.

Finderio fintai

2006-05-24T11:39:00.000+03:00

Čia toks finčiuks, kuris kažin ar kam nors pravers, bet nors aš turiu ką parašyt :) Mac OSX turi tokį dalyką, kaip "Folder Actions", ir man dažnai kildavo klausimas, nafig jis reikalingas. Na, daugmaž prasmę jo žinau, bet niekad nesugalvojau, koks gali būt realus panaudojimas. O vat šiandien sumąsčiau, nes kadangi idant vienok tiesiog atsidariau savo "Downloads" folderį ir pabandžiau ten surast vieną failą :) Idėja, kaip tokio aiškaus failų organizavimo išvengti, paprasta kaip trys kapeikos - nusprendžiau visus failus sumetinėt į katalogus pagal extensioną. Va taip va.

Tam nerealiai prabangiai super turbo ultra geras dalykas yra automatorius, kadangi aš esu lamerys "ant applescripto" ir nifiga jo niekaip neišmokstu. O kadangi ir automatoriaus nemoku, tai jame naudoju vieną vienintelį actioną - "run shell script" :) Shellu pažymim /bin/bash ir inputą pasirenkam kaip argumentus (Pass input: as arguments). Tada pastinam šitą pasakėlę:

d="/dest/dir"
for f in "$@"
do
    extension=${f//*./}

    case $extension in
        dmg)
            mv $f $d/DMGs
            ;;
        gz|zip|tar|tgz|rar)
            mv $f $d/Archives
            ;;
        pdf|doc|rtf)
            mv $f $d/Documents
            ;;
        *)
            ;;
    esac
done

Aišku, mano tikras skriptas išties kitaip atrodo, čia tik kaip pavyzdukas sudėti extensionai, ir tai tik mažosiomis raidėmis, kad lengviau skaityt būtų. Va. Bet idėja, manau, aiški. Tuomet greitai greitai išsaugau savo automatoriaus skriptą (mhm..) kaip Folder Actions pluginą, ir prisabačinu jį prie savo daunlauds folderio. Kaip ir viskas, sveiks valio, dabar kiekvienas parsipūstas failas pasidės į nuosavą lentynėlę. Kad tik aš žinočiau, kaip išjungt, jog tas automatoriaus gaidukas kiekvieną failą saugant ant docko neiššoktų, būtų visai liuks...

O dabar dar apie tą dalį, kur sakiau, kad nemoku automatoriaus :) Panašų dalyką galima parašyt ir vien su automatorium, tačiau man pavyko pasirašyt skriptuką tik vienam extensionui. Bėda ta, kad "filter finder items" automatoriaus actionas sugeba tik AND'int failo parametrus, o ne OR'int... Vat tau ir dragendropas :(

Tuo ir baigiam šios dienos lietuvių kalbos pamokėlę, kas netingit, galit suskaičiuot, kiek šiame poste parašiau nelietuviškų žodžių bei ir taipogi be abejo kiek padariau gramatinių klaidų :)

Savaitės daina #1

2006-05-05T09:04:00.000+03:00

$ cat /etc/motd

Savaites daina:
Loona - Bailando

Geros dienos.

awk tipsas #1

2006-05-03T10:58:00.000+03:00

Net nežinau, ar čia tipsas ar tiesiog prašymas, turbūt ir tas ir tas.


$ grep "vogr vogr" .. | awk "{..}"

tipo eilutė atrodo kvailai, kadangi awk pats moka "grepint", užtenka rašyt


$ awk "/vogr vogr/{..}" ..

Vat. Skiriu šitą tipsą visiems lietuviškų hautu rašytojams :)

Offtopic: Ir reikėjo man prisišnekėt nesąmonių, kad vėl pradedu rašyt blog'ą :) Dabar reikia kimšt čia kažkokį kontentą, o kadangi beleko nelabai noris rašyt (bo gūglas padla indeksuoja), tai reiks užsiimt kūryba ir stengtis kuo mažiau pezalų rašyt. Ir priminkit kas nors, jei vėl nusivažiuosiu ir pradėsiu postint "link of the day" abr abr lygio stuffą.

Belekas

2006-04-26T09:31:00.000+03:00

Tai va. Pagalvojau pagalvojau, kad gal vėl pradėt rinkt visokias nesąmones ir dėt čia. Pratryniau daugumą senobinių įrašų čia, palikau tuos, kurie dar kažkiek verti skaitymo yra, nu ir va, pradėjau vėl lietubiškai rašyt. Kodėl, tai nežinau, ba turbūt vėl po poros įrašų užknis, bet tai kam čia įdomu :)

Update: Kažkokiu būdu ecto sukniso protą ir neištrynė senų įrašų, ir refrešinus jie pasiliko. Kadangi rankom rankiot ir trint senus entrius užknisa, tai ir netrinsiu jų antrą kartą. Šūdas.

Links of the day

2005-06-27T13:19:00.000+03:00

pam_usb module.
xml-logs perl library, seems to be interesting. Why the hell I didn't learn french in university as I should? :)

Minimal package requirements for Solaris smpatch

2005-05-13T10:23:00.000+03:00

So, you have Solaris running, and want a normal patch tools. On Solaris 10, there's utility, called smpatch, which does pretty good job on analyzing your system for patches, downloading and applying them. Except, that if you'll read official Sun's documentation, or smpatch(1M) manual, you'll notice, that minimal requirements for it are...

The system on which you run Sun Patch Manager must be running at least Solaris 8 and have the Developer Software Support Group installed. If your system runs Solaris 8 or Solaris 9, it must also have the Sun Patch Manager 2.0 software installed. If your system runs Solaris 10 and has the Developer Software Support Group installed, the Sun Patch Manager 2.0 software is included.

Nice, especially when you know, that Developer Software Group is End User environment + some developer tools, weighting approx 1.9 Gb. And including X windows system, CDE and bunch of other stuff. I'm not sure, is it what you'll want for server, but it is definitely not what I would consider.

Okay, now I'll give you bare minimum of packages, which are required for Sun Patch Manager, assuming that Solaris 10 is installed with minimum available configuration:

SUNWj5dev
SUNWj5rt
SUNWppror
SUNWpprou
SUNWppro-plugin-sunos-base
SUNWmga
SUNWlibC

Note, that PatchPro packages depends on jdk 1.4 packages (SUNWj3dev and SUNWj3rt), but if you'll install them, running smpatch will throw exception like this:

Exception in thread "main" java.lang.UnsupportedClassVersionError: com/sun/patchpro/cli/PatchServices (Unsupported major.minor version 49.0) at java.lang.ClassLoader.defineClass0(Native Method) ...

Well, this error indicates, that java version is older, than the version, for which specific classes were compiled. So, installing jdk 1.5 fixes this problem. Now, where should I report, that Sun made a patch for this available via smpatch? :)

Technorati Tags: Solaris

Link of the day

2005-05-11T13:01:00.000+03:00

Solaris software RAID bug, which cost me a few weeks to find out.. Nice, isn't it?

Why Apple is evil. Part II

2005-04-01T13:11:00.000+03:00

Actually, this must be a part one, because that's the source of the cartoon I posted earlier. Today I accidentally discovered this, and I recommend reading it to all you daemon lovers :) You can start from Apple Macintosh section. If you're too lazy of reading the whole article, here are few of my favourites:

Apparently the Darwin OS is not the original creation of Apple Computers but is instead based off of an older, obsolete OS called "BSD Unix". The child-indoctrinatingly-cute cartoon mascot of this OS is a devil holding a pitchfork (pictured right). This OS -- and its Darwin offspring -- extensively use what are called "daemons" (which is how Pagans write "demon" -- they are notoriously poor spellers: magick, vampyre, etc.) which is a program that hides in the background, doing things without the user's notice. If you are using a new Macintosh running OS X then you probably have these "daemons" on your computer, hardly something a good Christian would want! This clearly illustrates that not only is Macintosh based on Darwinism, but Darwinism is based on Satanism.

Yup, you satanist obsolete OS user, shame on you!

MacOS X contains another Satanic holdover from the "BSD Unix" OS mentioned above; to open up certain locked files one has to run a program much like the DOS prompt in Microsoft Windows and type in a secret code: "chmod 666". What other horrors lurk in this thing?

Maybe horrors such as a kill command? Uhh, I'm outta here..

Why Apple is evil

2005-03-29T16:47:00.000+03:00

I couldn't resist ;)

Taken from Joy Of Tech.

Link of the day

2005-03-29T09:42:00.000+03:00

Okay, I'm starting to hate these links of the day. I guess I should start some sort of linkblog, because it's not really wise to spam this blog with various links. Maybe I should look on blogger's templating abilities and search for some inline formatting for del.icio.us. You'll see changes here, if I'll find one :)

Oh, almost forgot. Here is some obvious, but pretty interesting stuff. :)

Searching for a perfect wiki. Again

2005-03-24T09:19:00.000+02:00

Some time ago, I bashed on how every wiki in this world sucks. Few days ago I found wiki I was looking for (again). It's called Instiki. There's also a fork of this project, called pimki, which adds some functionality to it, like blog system.

Well, Instiki is a decent project, and for Mac users there's also a package, so you don't need to mess with anything else (like installing ruby and additional stuff), just run it and there you go - you have a fully working wiki on localhost:2500. Nice minimalistic (and intuitive) web interface, changelog and all the usual stuff you expect in wiki. There's one missing feature though - Instiki has no namespace support. And it seems developers don't care ;-( From their site:

This feature can be overused. Wikis were not meant to be hierachical. That’s why it should be limited to one level of sub-page. Some redundancy in the top-level namespace can be good. But too much redundancy clutters things up.

WTF? If someone wants to mess things up, he will do it one way or another. Why not to make this feature optional, so people who need it had a choice? If I want to make notes for some project, for example, would it be more intuitive to look for MyClassHasThisFuckingMethod and HeresAnotherClassWithTheSameFuckingMethodName or just Class/Method ? Oh, and don't say to me wikis were not intended to document your projects - it's just an example (and maybe not the best). But overall feeling of Instiki is good, so it seems I decided to stay with it.

Hm, it looks like a perfect time to make yet another ugly hack...

Link of the day

2005-03-23T08:43:00.000+02:00

Here. There's some really amazing stuff in there...

Hm, it looks like my blog is only collection of some 'links of the day'. But I'm just too busy ( s/busy/lazy for blogging/ if you want) to post something new here. Well, maybe I'll write something on Easter, when I'll have to go to village and will have nothing to do ;-)

Link of the day

2005-03-22T08:51:00.000+02:00

UNIX motorcycle. To be exact, it runs on FreeBSD 5.2.1 :)

No comments...

2005-03-21T14:33:00.000+02:00

Read this. Oh, and read a followup also. :)

Link of the day

2005-03-08T16:42:00.000+02:00

Tracking PCs anywhere on the Net.... I wonder what things this can bring up..

Link of the day

2005-02-17T15:13:00.000+02:00

The Fall and Rise of IT: Part 1.

Python under Solaris 10

2005-02-14T08:44:00.000+02:00

If it doesn't compile (it doesn't ;)), here's the fix.

Link of the day

2005-02-09T11:22:00.000+02:00

OpenOffice builds. For FreeBSD.

Getting more from FreeBSD ports

2005-02-08T16:35:00.000+02:00

This entry is somewhat hard to write. Maybe I just don't know how to start this post :)

Ok, let's start. There are three basic ways to find out, what are dependencies of given port:

make -V RUN_DEPENDS -V BUILD_DEPENDS
make all-depends-list
look at Makefile

Well, this is not what I want. Usually after using one of the above (third option, mostly ;) ), you run pkg_info just to find out, what ports are present and what are missing. And it takes some time for such a simple task. So, I wrote simple addition to Makefile to give some more information on ports. It adds two more targets - "show-rdeps" for run depends and "show-bdeps" for build depends. I haven't made up my mind how to call these - "bdeplist" and "rdeplist" seems to be more correct when looking to other already present targets, but somehow show- prefix is more intuitive to me.

sysutils/portupgrade$ make show-rdeps
[+]  ruby-1.8.2_1
[+]  ruby18-bdb1-0.2.2

[+] indicates installed port, and [-] port, which is not present on the system (of course :)). What you need to do is fetch this and place it to /usr/

Of course, it could be done better (for example, checking for real dependent file's presence on the system), but I think this is overkill, as is recursive checking for dependencies in this case. This makefile gives enough information, at least for me.

What I'm still missing on ports, is a nice way on figuring out what options for given port are. It would be easy to implement, if makefiles had some line like this:

VARIANTS= NO_GUI USE_PYTHON SHOOT_AT_SIGHT

I couldn't think of any occasions when this would break something, and it doesn't add any real maintenance overhead. Oh, well, maybe it's not important for most people out there.

Very solid post on top Linux distros

2005-02-04T16:01:00.000+02:00

I don't know, how to feel about this. It appears FreeBSD is #11 linux distro. Ummm...

"FreeBSD is to all intents and purposes is a Linux and Unix mixture".

Yup, as I said, very solid.

Emacs and lithuanian fonts

2005-02-04T15:28:00.000+02:00

Ummm... At first I thought to write very long and clever entry, but I guess I'm just lazy today. So, instead I'll say this - it sucks. Well, at least on Mac. I can get japanese, korean and hell knows what else working, but not lithuanian.

First of all, the main reason for me to switch from vim to emacs is wiki. I want to have my own personal wiki, but I don't want some shitty XXXwiki running on apache on my notebook, why should I? PersonalWiki is too amateurish. VIM wiki mode is too incomplete. There was some app written in ruby, which suited my needs, but I forgot to bookmark it in del.icio.us, and now I can't remember what it was (and even google doesn't help). Emacs has muse-mode, which is nice. It's the thing. Well, except that emacs... You know. Sucks. Or maybe it's that I suck. Either way, I can't get emacs working with utf-8 and lithuanian keyboard on mac. Oh, fuck it, I won't waste your time explaining all these stupidities I ran into.

P.S. This entry is a note to myself, just in case I'll try something like this again someday..

P.P.S. It's funny, the old habits doesn't go away easily. I can't count how many times I ended up editing ~/.emacs with vim..

Link of the day

2005-02-04T12:07:00.000+02:00

Overlocking Apple Mac mini.

Links of the day

2005-01-27T15:07:00.000+02:00

Wikibooks. Why I didn't find this earlier? :)
vnc2swf. Nice and handy tool.
Self-Healing in Modern Operating Systems

Keeping an eye on FreeBSD ports security

2005-01-25T11:34:00.000+02:00

This tip is extremely simple, yet I find it useful. I assume you know how to get "make update" on /usr/ports working. Then, add it to root's cron before daily periodic is run:

0 23 * * * cd /usr/ports && /usr/bin/make update >/dev/null 2>&1

Install vxquery ( cd /usr/ports/security/vxquery && make install). Then, make a simple periodic script, name it /etc/periodic/daily/510.vuxml, for example:

#!/bin/sh

vxquery="/usr/local/bin/vxquery"
vulns="/usr/ports/security/vuxml/vuln.xml"

if [ -r /etc/defaults/periodic.conf ]
then
  . /etc/defaults/periodic.conf
  source_periodic_confs
fi

case "${daily_vuxml_enable}" in
  [Yy][Ee][Ss])
      echo ""
      echo "Ports security status:"
      if [ ! -x ${vxquery} ]
      then
        echo "daily_vuxml_enable is set, but vxquery is not executable"
        rc=2
      else
        /bin/ls /var/db/pkg | ${vxquery} -f - ${vulns}
        rc=0
      fi
      ;;
  *)
      rc=0
      ;;
esac

exit $rc

As you see, in /etc/periodic.conf set daily_vuxml_enable="YES". Also, if you want to get these by email everyday, check that daily_output is set to your mail (and sendmail can send mail, of course). That's it.

FreeBSD, Linux and md5 passwords

2005-01-20T12:02:00.000+02:00

Ok, I hope this bit will be interesting for you. Do you know, how passwords are encrypted on FreeBSD or Linux systems using md5? You can read manuals, but manuals are not that interesting :)

Ok, so md5 is a one-way encryption algorithm, no wonder. That means, that once your password is encrypted, it can't be decrypted in any way. If you'll look at /etc/master.passwd ( that's /etc/shadow for Linux users), you'll see encrypted password on second field, begining with $1$. That's md5 ( blowfish is identified with $2$, and DES passwords are a long forgotten dream, I hope ).

So, now is a natural question - how the system knows, is your password correct if it's one-way encryption. The answer is also natural - when you enter your password at login prompt, system takes it, encrypts and does strcmp() to look if your entry matches password field on passwd. Pretty easy, huh?

Now this is where the fun begins. Let's create user test with password test on two hosts - host1 and host2:

host1# pw useradd test
host1# passwd test
Changing local password for test
New Password:
Retype New Password:

host2# pw useradd test
host2# passwd test
Changing local password for test
New Password:
Retype New Password:

Now, let's check how these encrypted passwords look. Oh, and use awk, just to impress everyone and feel l337:

host1#  cat /etc/master.passwd | awk -F: '/^test/{print $2}'

$1$0fsdwehr$kEIXECc/fokqQiRiLs4h81

If you run the same command on host2 though, your output will be different:

host2#  cat /etc/master.passwd | awk -F: '/^test/{print $2}'

$1$pQ/TC9P5$qZWnv7BhKPNhISPK/2dQA0

And if you'll change password to the same on some host, once again you'll see the different value of the field. Also, if you copy that field from host1, and change on host2, user test still be able to login with his password (test, that is). Now, here's the question: how this password can be different each time and the system still knows is it correct on login, if this is a one-way encryption algorithm? How can it be, that you get different md5 value each time, and still be able to strcmp() your login password and the value stored on passwd file?

If, by any accident, you went to university to study computer science or math and, by any accident, you managed to go to more than one lecture on the semester, you'll probably know, that usually encryption algorithms have seeds (huh, huh... Hey Beavis, he said seed). Seed is some random value, which is used in algorithm, to randomize result. That way, without knowing specific seed, even having algorithm which was used, it's not an easy task to decrypt (if algorithm can be decrypted) result.

So, by now, you can guess - password field stores not only encrypted password value, but it also has the seed. Now look again at the password fields above. If you'll look long enough and don't fall asleep, you'll probably see, that actually there are 3 dollar signs. Yup, they are used as a separators, and the last $ separates seed from actual encrypted password value.

Mkay, and now probably the last question: why the hell do we need to have a seed and a password in that field. Why we can't use standard seed for the system? Because it's not fun. Because having a seed, it's more easy for someone to make a database with original passwords and their crypted equivalents (you know what that means, don't you?).. There are some such databases, but are they worthy, having all of the above?

Solaris, packages and pain in the ass

2005-01-18T09:20:00.000+02:00

Please, don't get me wrong. I love Solaris as a system. I really do, and I think most of these opensource, unix-like systems lag behind. But it's good until it comes to package management. Maybe it's just me, but I really do think, that Solaris package management sucks, and sucks a lot. Or maybe I'm too sentimental for FreeBSD ports system..

Because of this crippled Solaris package management I decided to stick with these only for a base system, and for most freeware I need to try some alternatives. And yes, I hate that smpatch requires java (and by the way, on my Solaris 10 build it fails with java exception, but maybe it's just too old and not enough tested build ).

I found three alternatives - pkg-get, NetBSD pkgsrc and Gentoo portage (if you know more, please comment :) ). And none of them suits me enough. pkg-get seems to be most mature and stable solution, binary updates and all that. But it smells like Debian, and I hate that :) NetBSD doesn't have binary packages, although supports them. They are just gone from ftp server, it seems. And gentoo portage... It's some bad joke on Solaris, but maybe sometime in future it will reach pretty stable status ( AFAIK it's developed by only one person). So, I see only two solutions - use pkg-get and feel some bad taste in the mouth, or use pkgsrc on dedicated machine to build packages for production...

Comments, ideas?

IBM frees 500 patents

2005-01-12T14:25:00.000+02:00

This is interesting. Yet there's no word what these patents really are, I suppose if you don't "open" something these days, you're out of fashion. Mmmm, what will be next in line? Microsoft will open source Internet Explorer? :)

Delicious

2005-01-07T14:16:00.000+02:00

Well, that I didn't expect... I use delicious for some time, but to appear this on newsweek... I wonder what content this will bring up to my RSS reader.. I just hope this won't become some sort of another pr0n/warez posting portal :)

Homepage deletion

2005-01-04T16:11:00.000+02:00

So, finally, my old homepage was deleted. I don't mind, i guess, but still, there was some really important information ( which now is missing). I hate when that happens... Ok, whatever, it's about time (considering that this page was on one of servers at previous job, which i left two years ago)...

First

2005-01-03T14:42:00.000+02:00

Mkay... So, I cleared all my previous entries to start a brand new weblog (it's not that previous entries were important, they were just some random crap i filled in some blog editors for testing). Welcome ;-)