Blog.Project13.pl » trick

(Almost) Automatically convert files into PDF

Ktoso — Mon, 16 Nov 2009 00:56:55 +0000

I’m learning Numerical Analysis right now and a friend of mine found some really nice PS files by dr Marian Bubek ( http://www.icsr.agh.edu.pl/~mownit/mownit.html ). I was really happy to see some *.ps but some people from my fellow students started complaining that they’d rather have pdf’s and not ghostscript files (who knows why they’d do..?). Anyways, they all had “manual” repetitious methods for converting the files – even uploading to somewebsite to have them converted over there “in the cloud”… I though of a slightly quicker and more efficient way, here it is, hope you’ll like it. Ah, there is One “non standard” requirement for this to work, you have to install cups-pdf :-)

wget http://www.icsr.agh.edu.pl/~mownit/mownit.html -r –level 1 -A.ps –cut-dirs 4

mv www.icsr.agh.edu.pl/* .
rm -rf www.icsr.agh.edu.pl/
for file in `dir -f *` ; do
lpr -P 'cups-PDF' $file;
echo "press enter when cups is done printing…" #yeah, i got lazy here, one could watch lpq for changes etc.
read oczekiwanie;
mv /home/ktoso/Pulpit/cups-pdf/template.pdf ./$file;
done;
# ________________
#< Happy hacking! >
# —————-
# \ ^__^
# \ (oo)\_______
# (__)\ )\/\
# ||—-w |
# || ||

Terminal Heroes – 5 – List internet active apps

Ktoso — Sat, 19 Sep 2009 14:59:01 +0000

A simple yet usefull command-line-fu I made up:

#list all internet active apps

$ netstat -lantp | grep -i establ | awk -F/ '{print $2}' | sort | uniq
firefox
java
pidgin
thunderbird-b

Lookup this command at CommandLineFu
Thanks to HarimaKenji for fixing a little issue with this command.
—update—
CommandLineFu user submited a super short version for this:lsof -P -i -nComandLineFu ownz!

Smart webpage migration

Ktoso — Thu, 27 Aug 2009 18:15:15 +0000

I recently had to migrate a big website – about 5GB – to a new server. That could take a while to do, right? Well, maybe if you did it like that (the not smart way):

Oh man, that would take sooo much time...

Thanks goodness I’m not really keen on doing stuff the slow “not_smart” way, and the new server is a dedicated CentOS machine! :-) So, what did I do?

Yeah, no time wasted here!

There’s a lot of ways to accomplish this if you have shell access. You could:

wget -r --user=login --password='pass' ftp://admin:example.com/folder/

ncftp #normal ftp should also work the same way
open ftp://example.com
login
pass
mget -r folder

Yes, SCP is a great tool for this kind of situation, but i couldn’t use it since the old server didn’t have ssh acces :-( Here is how it could be used in such a situation:
```
scp -r login@old.example.com:/home/folder login@new.example.com:/home/folder
```

I used the second method and am quite satisvied with it, as the servers did all the migrating i set up the database and did some other project related stuff… :-)

mencoder mastery – part 2

Ktoso — Tue, 18 Aug 2009 15:07:23 +0000

Tym razem małe polecenie włączające zewnątrzny plik mp3 (z ogg zadziała tak samo):

#poniższe polecenie bierze plik old.avi, i łącząc go z sound.mp3 (zachowując jego codec audio) tworzy plik new.avi

mencoder old.avi -o new.avi -ovc copy -oac copy -audiofile sound.mp3
#analogicznie możemy wziąć plik audio w innym formacie i przetworzyć go np na mp3, wtedy skorzystamy zamiast z copy z mp3lame
mencoder old.avi -o new.avi -ovc copy -oac mp3lame -audiofile sound.wav #czy inny format

mencoder mastery – part 1

Ktoso — Tue, 18 Aug 2009 14:46:32 +0000

Skoro była taka seria z wgetem, to przyszedł czas na to samo z mencoderem. mencoder to program do ogólnie pojętej obróbki plików video. Jeżeli korzystasz z jakiegoś okienkowego programu do modyfikowania wideo pod linuksem, z dużym prawdopodobieństwem jest on nakładką na mencodera :>

Dzisiejszy temat to obracanie całego filmu:

mencoder -ovc lavc -vf rotate=1 -oac copy input.mpg -o output.mpg

#Objaśnienia:
#-ovc = output video codec
#-oac = output audio codec
#-vf = video filters, pozwala na zakolejkowanie różnych filtrów do wykonania, my korzystamy tylko z jednego:
#rotate=X = obraca cały materiał video przy czym X należy do:
# 0 Rotate by 90 degrees clockwise and flip (default).
# 1 Rotate by 90 degrees clockwise.
# 2 Rotate by 90 degrees counterclockwise.
# 3 Rotate by 90 degrees counterclockwise and flip.

Masowe obrócenie filmików z wakacji teraz nagle stało się proste czyż nie? :-) Czemu się tym zainteresowałem można by się spytać… otóż obracałem filmik nagrania mojej nowej popierdółki w j2me: Xplode. ale to już materiał na kolejny wpis.