download Derby install package .zip file from its website and unzip it to a folder, such as ~/db-derby-10.15.2.0-bin.

edit .bashrc at home folder, add 2 extra lines (for enviromental variables):

$ export DERBY_HOME=~/db-derby-10.15.2.0-bin $ export PATH="$DERBY_HOME/bin:$PATH"

Optional: copy ~/db-derby-10.15.2.0-bin/lib/derby.jar to this folder.

copy source files to this folder and rename package name (I already did it).

compile TestDB.java at src/ folder (don't run at BigJavaEO folder, since all packages are based on src/):

BigJavaEO/src $ javac ch24/TestDB.java

if at step 3, you copied derby.jar, run program at src/ folder:

BigJavaEO/src $ java -cp ch24/derby.jar:$DERBY_HOME/lib/derbyshared.jar:. ch24.TestDB ch24/database.properties

if you did not copy derby.jar at setp3, run program at src/ folder:

BigJavaEO/src $ java -cp $DERBY_HOME/lib/derby.jar:$DERBY_HOME/lib/derbyshared.jar:. ch24.TestDB ch24/database.properties

you should see output of Romeo