- first of all, Packet Tracer runs on its own QT4 libraries, and you don't want that. So, to change that, edit this file "/usr/local/PacketTracer5/packettracer" and comment out this line:
# export LD_LIBRARY_PATH=$PTDIR/lib- after that, you have to install whatever QT4 missing packets you have to install this:
apt-get install libqt4-gui
apt-get install libqt4-webkit
apt-get install libqt4-qt3support
if it still doesn't work after all this, just do this:
apt-get install libqt4-dev
Then your Packet Tracer is ready to go and simulate Cisco equipment.