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installing sage-8.8-Ubuntu_18.04-x86_64.tar.bz2

HI

cat /etc/os-release

NAME="Ubuntu" VERSION="18.04.3 LTS (Bionic Beaver)"

What do I need to do for /home/ortollj/.cache/pip/http ? See the message below

and why the date is this one ?:SageMath version 8.1, Release Date: 2017-12-07 │ │

https://ask.sagemath.org/question/46194/sagemath-launch-problems-on-ubuntu/

cd Downloads/
tar -xjf *.tar.bz2

apt install sagemath-common
pip install six
 apt install python-pip
 pip install six


Processing triggers for libc-bin (2.27-3ubuntu1) ...
root@ortollj-SATELLITE-C70-B:~/Downloads/SageMath# pip install six
The directory '/home/ortollj/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/ortollj/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Requirement already satisfied: six in /usr/lib/python2.7/dist-packages