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Initially, I had a problem with Cisco PacketTracer 7.3.1 libraries in Ubuntu 20.04.

Managed to fix it by installing the missing libraries.

sudo apt install libqt5webenginewidgets5 libqt5webenginecore5 libqt5script5 libqt5scripttools5

However, I'm getting another error after that

wolf@linux:/opt/pt/bin$ ./PacketTracer7 
./PacketTracer7: symbol lookup error: ./PacketTracer7: undefined symbol: _ZN16QWebSocketServer19handleTCPConnectionEP10QTcpSocketRK7QString, version Qt_5
wolf@linux:/opt/pt/bin$

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2 Answers2

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As a quick workaround for your problem please try to execute packettracer as below:

LD_LIBRARY_PATH=/opt/pt/bin/ /opt/pt/bin/PacketTracer7

This worked on fedora 30 after I was getting same error, and I assume it will work for you too as it appears to be that all libraries needed are already installed in the same directory as PacketTracer7 binary.

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Sannour
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  • wolf@linux:~$ /opt/pt/PacketTracer7 bash: /opt/pt/PacketTracer7: No such file or directory wolf@linux:~$ –  Oct 13 '20 at 14:20
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Don't execute it directly. It won't work

/opt/pt/bin/PacketTracer7

Instead, use the shell script in /opt/pt/

/opt/pt/packettracer

The path must be correct. Here is the snippet of that code

$ cat /opt/pt/packettracer 
#!/bin/bash

echo Starting Packet Tracer 7.3.1


PTDIR=/opt/pt
export LD_LIBRARY_PATH=/opt/pt/bin
pushd /opt/pt/bin > /dev/null
./PacketTracer7 "$@" > /dev/null 2>&1
popd > /dev/null
$