Can I delete the log files on my device? I'm currently developing on an Android 2.3.4 device. I've got root access to the file system, and I'm looking for the location of the system log files (like /var/log) so that I can delete them, but could not find these files on Android.

Does someone know where these files are located?
LogCat messages are not stored in files, but rather in circular memory buffers. You may clear these buffers using the following command:  

adb logcat -c


Source: Using LogCat