Open a command line session and copy the extra.dat file to the engine/dat subdirectory. Ensure the file is named extra.dat (all lower case). Type the following command and press ENTER: 

cp extra.dat /opt/NAI/LinuxShield/engine/dat/extra.dat 
 

Change directory to /LinuxShield/bin. Type the following command and press ENTER: 

cd /opt/NAI/LinuxShield/bin
  

Restart the LinuxShield daemons. Type the following command and press ENTER:

./nails.initd restart