encrypted partition on ubuntu 13.10 with password prompt

Follow the tutorial here:

http://rhce.co/create-and-configure-luks-encrypted-partitions-and-logical-volumes-to-prompt-for-password-and-mount-a-decrypted-file-system-at-boot.html

but in /etc/crypttab add “none luks” at the end of line:

mynew_data /dev/sdb1 none luks

Specifying java options for tests run by surefire

To specify jvm options for a test you can use argLine system property:

http://maven.apache.org/surefire/maven-surefire-plugin/test-mojo.html#argLine

E.g. to set max perm size to 2 GB you can do:
mvn clean install -DargLine="-XX:MaxPermSize=2g"

ssh tunneling to access restricted resources

To access a resource from restricted area (let the resource be: restrictedUrl.com:443) when you can ssh to a gateway (gatewayHost):

ssh login@gatewayHost -L 8013:restrictedUrl:443

Now you can access restrictedUrl:443 on localhost:8013 on your pc.

generating test report in maven

If you want to generate a report from tests that you run before:

mvn surefire-report:report-only

To run tests and generate report:

mvn surefire-report:report

The generated test report html can be found in: target/site

css selector in chrome

document.querySelectorAll(‘selector’)

Killing sessions for database in postgres

SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE pid  pg_backend_pid() AND datname = 'dbname';

For old versions of postgres:

SELECT pg_terminate_backend(procpid) FROM pg_stat_activity 
WHERE procpid  pg_backend_pid() AND datname = 'database_name';

More: http://stackoverflow.com/questions/5108876/kill-a-postgresql-session-connection

Xpath selector in chrome

Evaluating xpath in browser (e.g. in chrome’s console):
document.evaluate(‘//h2[@data-name=”confirmation-caption”]’,document, null, 0, null).iterateNext()

Maven: debugging tests

Invoke tests in the following manner and attach debugger to socket on port 5005.

Surefire

mvn -Dmaven.surefire.debug test
See:
http://maven.apache.org/plugins/maven-surefire-plugin/examples/debugging.html

Failsafe

mvn -Dmaven.failsafe.debug test

See: http://maven.apache.org/surefire/maven-failsafe-plugin/examples/debugging.html

Flash problems in ubuntu 12.04

To make flash plugin run well on ubuntu:

• choose flashplugin-installer version of flash in chrome
• invoke
sudo add-apt-repository ppa:ubuntu-audio-dev/ppa; sudo apt-get update;sudo apt-get dist-upgrade; sudo apt-get install linux-sound-base alsa-base alsa-utils linux-image-`uname -r` libasound2; sudo apt-get -y --reinstall install linux-sound-base alsa-base alsa-utils linux-image-`uname -r` libasound2; killall pulseaudio; rm -r ~/.pulse*; sudo usermod -aG `cat /etc/group | grep -e '^pulse:' -e '^audio:' -e '^pulse-access:' -e '^pulse-rt:' -e '^video:' | awk -F: '{print $1}' | tr '\n' ',' | sed 's:,$::g'` `whoami`

The second one is the first step of: https://help.ubuntu.com/community/SoundTroubleshootingProcedure

Setting a path to native libraries

export LD_LIBRARY_PATH=[path to directory containing native libraries]