Category Archives: Sys Admin

Material related to systems administration.

Disabling sound in Debian KDE

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I’m having a problem whereby my KDE session is “locking up” periodically for 5 or 10 minutes at a time. I checked /var/log/syslog and dmesg and it *seems* as though the high-priority audio threads are staving other threads, so I figure I’ll try to disable sound and see if my system continues to lock up. To disable sound I used:

root@mercy:/home/jj5# alsa force-unload
Unloading ALSA sound driver modules: snd-ens1371 snd-ac97-codec snd-seq-midi snd-seq-midi-event snd-rawmidi snd-pcm snd-page-alloc snd-seq snd-seq-device snd-timer (failed: modules still loaded: snd-ens1371 snd-ac97-codec snd-rawmidi snd-pcm snd-page-alloc snd-seq-device snd-timer).

OWASP ESAPI PHP tests: Security configuration file does not exist

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To get the source for OWASP ESAPI PHP:

 svn checkout http://owasp-esapi-php.googlecode.com/svn/trunk/ owasp-esapi-php-read-only

Make sure phpunit is installed with PEAR. To run the unit tests:

 root@mercy:/home/jj5/Desktop/owasp-esapi-php-read-only# phpunit test
 Security configuration file does not exist.PHP Fatal error:  Call to a member function xpath()
 on a non-object in /home/jj5/Desktop/owasp-esapi-php-read-only/src/reference/DefaultSecurityConfiguration.php on line 226

To get a better error message:

 root@mercy:/home/jj5/Desktop/owasp-esapi-php-read-only# grep -R 'Security conf' .
 ./src/reference/DefaultSecurityConfiguration.php:            throw new Exception("Security configuration file does not exist.");

Edit ‘src/refererence/DefaultSecurityConfiguration.php’ and replace “Security configuration file does not exist.” with “Security configuration file ‘$path’ does not exist.”

Try again:

 root@mercy:/home/jj5/Desktop/owasp-esapi-php-read-only# phpunit test
 Security configuration file '/home/jj5/Desktop/owasp-esapi-php-read-only/test/filters/../../testresources/ESAPI.xml' does not exist.PHP Fatal error:  Call to a member function xpath() on a non-object in /home/jj5/Desktop/owasp-esapi-php-read-only/src/reference/DefaultSecurityConfiguration.php on line 226

So the problem is a misconfigured path to the ESAPI.xml file, 

 root@mercy:/home/jj5/Desktop/owasp-esapi-php-read-only# grep -R \\.\\.\\/testres .
 ./test/filters/SafeRequestTest.php:            $ESAPI = new ESAPI(dirname(__FILE__) . '/../../testresources/ESAPI.xml');
 ...

Edit the SafeRequestTest.php file:

 root@mercy:/home/jj5/Desktop/owasp-esapi-php-read-only# vim test/filters/SafeRequestTest.php

On line 58 change “/../../testresources” to “/../testresources”.

Now our tests will run:

 root@mercy:/home/jj5/Desktop/owasp-esapi-php-read-only# phpunit test