How do I properly change the debian default python 2.7.9 to python3 or another version?












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what is best-practice for changing the default global python interpreter on my fresh debian-based linux node to python3.x?



When I create a fresh Debian or Ubuntu VM, one of the first things I do is use apt to install python3-dev & python3-pip, and sometimes either echo "alias python=python3" >> ~/.bashrc so I don't need to do it again, or even sudo su && echo "alias python=python3" >> /etc/profile.d/00-aliases.sh && exit when I need to make a daemon user like /home/SQLserviceacct/ or /home/Neo4jworker/.



The result is often havoc for potential programs or humans who make shell calls to python and then use any other default python-related environment variables. When things like $PYTHONPATH get assigned out of context, problems arise. virtualenvis probably involved somehow...









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    0















    what is best-practice for changing the default global python interpreter on my fresh debian-based linux node to python3.x?



    When I create a fresh Debian or Ubuntu VM, one of the first things I do is use apt to install python3-dev & python3-pip, and sometimes either echo "alias python=python3" >> ~/.bashrc so I don't need to do it again, or even sudo su && echo "alias python=python3" >> /etc/profile.d/00-aliases.sh && exit when I need to make a daemon user like /home/SQLserviceacct/ or /home/Neo4jworker/.



    The result is often havoc for potential programs or humans who make shell calls to python and then use any other default python-related environment variables. When things like $PYTHONPATH get assigned out of context, problems arise. virtualenvis probably involved somehow...









    share

























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      0








      0








      what is best-practice for changing the default global python interpreter on my fresh debian-based linux node to python3.x?



      When I create a fresh Debian or Ubuntu VM, one of the first things I do is use apt to install python3-dev & python3-pip, and sometimes either echo "alias python=python3" >> ~/.bashrc so I don't need to do it again, or even sudo su && echo "alias python=python3" >> /etc/profile.d/00-aliases.sh && exit when I need to make a daemon user like /home/SQLserviceacct/ or /home/Neo4jworker/.



      The result is often havoc for potential programs or humans who make shell calls to python and then use any other default python-related environment variables. When things like $PYTHONPATH get assigned out of context, problems arise. virtualenvis probably involved somehow...









      share














      what is best-practice for changing the default global python interpreter on my fresh debian-based linux node to python3.x?



      When I create a fresh Debian or Ubuntu VM, one of the first things I do is use apt to install python3-dev & python3-pip, and sometimes either echo "alias python=python3" >> ~/.bashrc so I don't need to do it again, or even sudo su && echo "alias python=python3" >> /etc/profile.d/00-aliases.sh && exit when I need to make a daemon user like /home/SQLserviceacct/ or /home/Neo4jworker/.



      The result is often havoc for potential programs or humans who make shell calls to python and then use any other default python-related environment variables. When things like $PYTHONPATH get assigned out of context, problems arise. virtualenvis probably involved somehow...







      debian scripting apt python environment-variables





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      asked 9 mins ago









      Rob TruxalRob Truxal

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