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Asked: 2018-10-13 23:33:45 +0800 CST

How to solve the error "Failed to launch Terminal" after upgrading python?

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How to solve the error "failed to launch Terminal" failed to execute child process GNOME-Terminal ( No such file or directory ) ? Please HELP us to solve this error. Currently I have upgraded Python to 3.7 version.

I have tried opening by clicking Alt+F2 and entered "gnome-terminal" but that too failed.

I tried "sudo apt-get purge gnome-terminal" in a shell opened on clicking "Ctrl + Alt + F3" keys which removed my terminal from the system

And then ran "sudo apt-get install gnome-terminal", I got terminal back but with the same error.

command-line gnome-terminal python 18.04

2 Answers

  1. Best Answer

    After many attempts,

    I found the cause of issue. Python upgraded to version 3.7 and lost its version 3.5

    sudo apt-get install python3.5

    Above command installed python 3.5 which is used to run terminal by Ubuntu 18.04 by default.

    Note:

    Uninstalling Python 3.5 causes removal of terminal, desktop, firefox and some applications in Ubuntu.

    Better don't do it.

    Carefully upgrade/install python versions.

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  2. The gnome-terminal requires python 3.5. The highest probability is that you could have messed with python 3.5 which comes readily installed with Ubuntu 18.04. You can check your default python version using 

    python --version

    If python3.5 not listed here you can check 

    ls /usr/bin/python*

    If its still not among the list then install it from this link

    In case python 3.5 is installed in your system, you would want to reinstall it.

    Lastly if you still cannot open the terminal try reinstalling gnome-terminal like this

    sudo apt-get install --reinstall gnome-terminal
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