Due to my own stupidity, I somehow set the python command to run python 3 instead of the default python 2. How do I undo this? I am on Ubuntu 18.04.
$ python -V
Python 3.7.6
$ python3 -V
Python 3.7.6
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it depends on your settings may be in your editorLinux Torvalds– Linux Torvalds2020-07-02 13:36:23 +00:00Commented Jul 2, 2020 at 13:36
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I don't think it's my editor. My gnome-terminal won't open because of this issue.Shivang Patel– Shivang Patel2020-07-02 13:38:38 +00:00Commented Jul 2, 2020 at 13:38
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I think you have to either : reinstall python 2 to override the name, or change the index for "python" to point at python2.Wise Man– Wise Man2020-07-02 13:38:41 +00:00Commented Jul 2, 2020 at 13:38
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Without knowing what you did, it is nearly impossible to tell you how to undo it, given that the way a command ends up being executed in the Unix environment has so many degrees of freedom (PATH, different shells, aliases, symlinks, ...). If you are on Ubuntu, you might be better off asking on askubunu.com, in case Ubuntu has some way of forcing things back to the as-installed state.Ture Pålsson– Ture Pålsson2020-07-02 13:43:23 +00:00Commented Jul 2, 2020 at 13:43
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5 Answers
You can change the alias python="/usr/bin/python2.7",for example :
alias python="/usr/bin/python3.3"
python
Python 3.3.3 (v3.3.3:c3896275c0f6, Nov 16 2013, 23:39:35)
You can also add this line in your .bashrc file
echo "alias python=/usr/bin/python3.3" >> ~/.bashrc
1 Comment
Peyman Majidi
and add the above answer codes to the
~/.bashrc file or run this command in the bash: echo "alias python=/usr/bin/python3.3" >> ~/.bashrcYou can list all the version of Python installed and change the default Python version Try the following commands on terminal.
$:~# update-alternatives --config python
There are 4 choices for the alternative python (providing /usr/local/bin/python).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/bin/python3 4 auto mode
1 /usr/bin/python2.7 2 manual mode
* 2 /usr/bin/python3 4 manual mode
3 /usr/bin/python3.7 3 manual mode
4 /usr/bin/python3.8 4 manual mode
Press <enter> to keep the current choice[*], or type selection number: 4
update-alternatives: using /usr/bin/python3.8 to provide /usr/local/bin/python (python) in manual mode
Set the default python version using python version. Finally, you can check the success of command as below.
root@kali:~# python --version
Python 3.8.2
It should show Python 2.x in your case.
Comments
On most Unix-Linux systems, python is a link or a symbolic link in /usr/bin or /usr/local/bin. You should search where it is with type python and control what it is.
If it is a link or a symlink, just remove it and make it point to your installation of python 2.
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Use type python to check what it points to, then check your .bashrc for two things:
- whether the path from
type pythonis somewhere included inPATH - whether you defined an alias for
pythonsomewhere
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To install python2, run:
sudo apt install python-minimal
To run python2,
python2