Author Archive

openssl with version information under sles11sp1

If you getting errors like this one $ /path/to/program /usr/lib/libcrypto.so.0.9.8: no version information available you need a libcrypto.so and a libssl.so with version information. Here are some information about the problem. openssl has evolved to a very important library in Linux distribution. A lot of cryptographic applications link to it including system libraries like pam [...]

JBoss Cluster – ServerPeerID

$SERVER/deploy/messaging/messaging-service.xml <attribute name="ServerPeerID">${jboss.messaging.ServerPeerID:0}</attribute> For clustered environment each jboss node need a unique ServerPeerID which must be a valid integer.

Migrating Ubuntu to Linux Mint 10

Here are some random notes for the migration from ubuntu to linux mint 10 (julia) ! /etc/apt/sources.list deb http://packages.linuxmint.com/ julia main upstream import deb http://archive.ubuntu.com/ubuntu/ maverick main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ maverick-updates main restricted universe multiverse deb http://security.ubuntu.com/ubuntu/ maverick-security main restricted universe multiverse deb http://archive.canonical.com/ubuntu/ maverick partner deb http://packages.medibuntu.org/ maverick free non-free #deb http://archive.getdeb.net/ubuntu [...]

Linux Virtual Tape Library

to save for later… mhvtl – A Linux Virtual Tape Library http://sites.google.com/site/linuxvtl2/ That could be a really nice backup solution.

Happy New Year 2011 !

Wish u a very Happy & Prosperous New Year 2011 !

ARD (Video)-Podcast Downloader

#!/usr/bin/perl -w # # ARD tagesschau podcast url $url = "http://www.tagesschau.de/export/video-podcast/webl/tagesschau/"; # # wget parameter $wgetopts = "–quiet"; $targetpath = "/tmp"; # # Enable verbose output $verbose = 0; # ############################# use XML::Simple; use LWP::Simple; sub output{ my $msg = shift; if ($verbose) { printf STDERR "$msg\n"; } } $xmlcontent = get($url); my $xml = [...]

AWS EC2 & S3 free usage

AWS Free Usage Tier (Per Month): 750 hours of Amazon EC2 Linux Micro Instance usage (613 MB of memory and 32-bit and 64-bit platform support) – enough hours to run continuously each month* 750 hours of an Elastic Load Balancer plus 15 GB data processing* 10 GB of Amazon Elastic Block Storage, plus 1 million [...]

Nagios plugin for JBoss monitoring – check_ajp

Released check_ajp v1 – see here

jstat – jvm memory stats

/usr/java/jdk1.5.0_22/bin/jstat -gcutil 18703 1s 10 gcutil = Summary of Garbage Collection Statistics (mandatory) 18703 = process id (mandatory) 1s = refresh interval (optional) 10 = counter (optional) $ /usr/java/jdk1.5.0_22/bin/jstat -gcutil 25532 1s 10 S0 S1 E O P YGC YGCT FGC FGCT GCT 0.00 0.00 71.36 35.59 72.25 39 6.195 1 0.440 6.635 0.00 0.00 [...]

IPv6 Adressen

Bahn-Streiks sind was tolles…da schafft man was Aufbau einer IPv6 Adresse 128 Bit insgesamt. Die ersten 64-Bit sind für das Subnetz-Präfix reserviert, gefolgt von den letzten 64-Bit für den Host. nnnn:nnnn:nnnn:nnnn:hhhh:hhhh:hhhh:hhhh Jeder Block ist 16-Bit lang. Nullen am Anfang eines Blockes können gekürzt werden z.B. 2001:db8:0900:085a:0000:0000:0000:0002 würde also 2001:db8:900:85a::2 ergeben. Zusammen hängende Blöcke von Nullen [...]