[SOLVED] Failed to execute child process

bmohanraj91 · 04-15-2017, 12:03 PM

Hi all, I recently installed packet tracer application in pepper mint linux. I could open the application from terminal by typing 'packettracer' but when I tried to launch it from the start menu or Application finder it throws error 'Failed to execute child process'. Need help to fix this issue.

ondoho · 04-15-2017, 02:54 PM

doesn't it work ok from the command line?
how did you install it, which version?
which linux distro?

fwiw, this is the app in question: http://www.netacad.com/about-network.../packet-tracer
what i see is lots of qt4 dependencies, so it's not a command line app.

you should look at the app's *.desktop file, most likely /usr/share/applications/packettracer.desktop
if it isn't that, look at the list of installed files, that will tell you where the desktop file is.
open the .desktop file in a plain text editor, and have a look at the Exec= line. Post it here.

bmohanraj91 · 04-16-2017, 12:38 AM

1.If I type 'packettracer' in terminal, it open and I can work on that app.

2. I extracted the file using tar command and installed by using the sudo ./install.

3 Linux OS detail: No LSB modules are available.
Distributor ID: Peppermint
Description: Peppermint 7 Seven
Release: 7
Codename: xenial

4.The link you have given is where I have downloaded that app.

5. I found packettracer file in /usr/share/applications/ which contain the text below.
[Desktop Entry]
Name= Packettracer
Comment=Networking
GenericName=Cisco Packettracer
Exec=/opt/packettracer/packettracer
Icon=/usr/share/icons/packettracer.jpeg
StartupNotify=true
Terminal=false
Type=Application

Quote:

Originally Posted by ondoho

doesn't it work ok from the command line?
how did you install it, which version?
which linux distro?

fwiw, this is the app in question: http://www.netacad.com/about-network.../packet-tracer
what i see is lots of qt4 dependencies, so it's not a command line app.

you should look at the app's *.desktop file, most likely /usr/share/applications/packettracer.desktop
if it isn't that, look at the list of installed files, that will tell you where the desktop file is.
open the .desktop file in a plain text editor, and have a look at the Exec= line. Post it here.

ondoho · 04-16-2017, 03:13 AM

something is different between this:

Quote:

Originally Posted by bmohanraj91

1.If I type 'packettracer' in terminal, it open and I can work on that app.

...and this:

Quote:

Exec=/opt/packettracer/packettracer

please:

Code:

which packettracer

you can also try (from terminal) to enter the full path:

Code:

/opt/packettracer/packettracer

bmohanraj91 · 04-16-2017, 03:33 AM

which packettracer shows this

/usr/local/bin/packettracer

pan64 · 04-16-2017, 03:51 AM

looks like you need to replace:

Code:

Exec=/opt/packettracer/packettracer
to this:
Exec=/usr/local/bin/packettracer

or you may try to link it:

Code:

ln -s /usr/local/bin/packettracer /opt/packettracer/packettracer

bmohanraj91 · 04-16-2017, 05:00 AM

I have learnt a new thing in linux today, thank you very much.
I changed the .desktop file EXEC=/usr/local/bin/packettracer and now I can launch the application from Desktop or from the Application finder.

Quote:

Originally Posted by pan64

looks like you need to replace:

Code:

Exec=/opt/packettracer/packettracer
to this:
Exec=/usr/local/bin/packettracer

or you may try to link it:

Code:

ln -s /usr/local/bin/packettracer /opt/packettracer/packettracer