Piotr Zaniewicz » Linux

Spamassassin + vpopmail + sa-learn + learning from IMAP folders

Piotr Zaniewicz — Sat, 16 May 2009 22:37:33 +0000

Below is a quick solution to making spamassassin learn from specific IMAP folders. Script represents a daily cron script and I just used sudo vpopmail (has to be the same as your spamd user) to simplify things. You probably should use user specific crontab…

#!/bin/bash
for F in `find /home/vpopmail/domains -type d -name '.Junk' -print`;
do sudo -H -u vpopmail /usr/bin/sa-learn --spam $F/cur/* &> /dev/null;
rm -f $F/cur/*;
done;

FPDF polskie wolne czcionki

Piotr Zaniewicz — Mon, 19 Jan 2009 11:13:26 +0000

Postanowiłem wreszcie trochę uporządkować czcionki używane do generowania dokumentów pdf oraz obrazków wykorzystujących czcionki ttf. Załączam zestaw gotowej do zainstalowania czytelnej czcionki z pakietu liberation-fonts. Które są upowszechnione na licencji GPL.

Pobierz

Odmiana imion php mysql

Piotr Zaniewicz — Mon, 12 Jan 2009 03:26:57 +0000

Postanowiłem udostępnić uzupełniony zbiór odmian polskich imion dla bazy MySQL.

Plik jest gotowy do importu do bazy MySQL, zawiera imiona, odmianę, płeć oraz ilość sylab występujących w imieniu. Można go wykorzystać na przykład w skryptach php wysyłających życzenia urodzinowe lub pozdrowienia.

W przypadku braku odmiany, proszę wpisać w komentarzach to uzupełnię.

localhost.customs or localhost:1001

Piotr Zaniewicz — Mon, 17 Sep 2007 18:12:32 +0000

Well, just recently I discovered an error in my Apache2 log file saying:

127.0.0.1 – - [17/Sep/2007:20:10:32 +0200] “GET /” 400 466

Well, that is a SSL log, so I am working to figure out what it really is…

Ok, “tshark -i lo -S -V > dump.shark” command comes in handy to see the packets, and here is what we get:

Internet Protocol, Src: 127.0.0.1 (127.0.0.1), Dst: 127.0.0.1 (127.0.0.1)
Version: 4

Source: 127.0.0.1 (127.0.0.1)
Destination: 127.0.0.1 (127.0.0.1)
Transmission Control Protocol, Src Port: 53612 (53612), Dst Port: customs (1001), Seq: 1, Ack: 1, Len: 155
Source port: 53612 (53612)
Destination port: customs (1001)
Sequence number: 1 (relative sequence number)
[Next sequence number: 156 (relative sequence number)]
Acknowledgement number: 1 (relative ack number)
Header length: 32 bytes
Flags: 0×18 (PSH, ACK)
0… …. = Congestion Window Reduced (CWR): Not set
.0.. …. = ECN-Echo: Not set
..0. …. = Urgent: Not set
…1 …. = Acknowledgment: Set
…. 1… = Push: Set
…. .0.. = Reset: Not set
…. ..0. = Syn: Not set
…. …0 = Fin: Not set
Window size: 32800 (scaled)
Checksum: 0xfec3 [incorrect, should be 0x14e9 (maybe caused by checksum offloading?)]
Options: (12 bytes)
NOP
NOP
Timestamps: TSval 289375346, TSecr 289375346
Data (155 bytes)0000 47 45 54 20 2f 20 48 54 54 50 2f 31 2e 30 0d 0a GET / HTTP/1.0..
0070 28 69 6e 74 (int
0080 65 72 6e 61 6c 20 64 75 6d 6d 79 20 63 6f 6e 6e ernal dummy conn
0090 65 63 74 69 6f 6e 29 0d 0a 0d 0a ection)….

Looks like a known error of dummy connections, but a bit different one, since Apache2 didn’t speak SSL to its SSL server, so no proper “GET” request has been logged – just info about the 400 error.

The way I fixed it was to to increase the number of “MaxSpareServers” to “10″ in my Apache2 configuration file. I don’t need more…

Using sed to change strings in multiple files

Piotr Zaniewicz — Sat, 15 Sep 2007 19:56:01 +0000

Ok, one more tip for today, which makes it very simple to change text within multiple files.
Say for example that you want to change Bush to Kerry in 50+ files ending with “html”.
OK, now you could edit them, but it is too much of a hustle. Instead let’s use sed and some bash scripting:

for F in `find ./ -type f -name '*.html' -print`;
do mv $F $F.tmp;
sed 's/Bush/Kerry/g' $F.tmp > $F;
rm $F.tmp;
done;

Be careful however, when changing “<” or “>” or any other character that has to be escaped! You have to escape it using a backslash – “\”. So for example to escape a “<” you would write “\<”. SIMPLE, right?

Questions? Here is a sed string changing script that I used.

Unzip, untar, unpack all archives

Piotr Zaniewicz — Sat, 15 Sep 2007 19:13:54 +0000

Once I came to a point of having downloaded 20+ tar.gz files and facing a need of finding an efficient way to extract them. If you are having such a problem then this simple solution will help:

for F in `find ./ -type f -name '*tar.gz' -print`;
do tar xvzf $F;
done;

What it does is for every file ending with “tar.gz” found in current folder “./” it executes a command “tar xvzf“, which unpacks the archive. Very simple but also VERY useful. Try with unzip and other commands.
Yes, you may delete files after unpacking by adding “rm $F;” after the tar statement.
However, it is always good to keep the original source!