I have tried entering:
sudo apt install python3-pip The error I get is:
$ sudo apt install python3-pip Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: libexpat1-dev libpython3-dev libpython3.5-dev python-pip-whl python3-dev python3-wheel python3.5-dev The following NEW packages will be installed: libexpat1-dev libpython3-dev libpython3.5-dev python-pip-whl python3-dev python3-pip python3-wheel python3.5-dev 0 to upgrade, 8 to newly install, 0 to remove and 0 not to upgrade. Need to get 1,219 kB/39.1 MB of archives. After this operation, 56.8 MB of additional disk space will be used. Do you want to continue? [Y/n] y Ign:1 xenial-updates/universe i386 python-pip-whl all 8.1.1-2ubuntu0.1 Ign:2 xenial-updates/universe i386 python3-pip all 8.1.1-2ubuntu0.1 Err:1 xenial-updates/universe i386 python-pip-whl all 8.1.1-2ubuntu0.1 404 Not Found Err:2 xenial-updates/universe i386 python3-pip all 8.1.1-2ubuntu0.1 404 Not Found E: Failed to fetch 404 Not Found E: Failed to fetch 404 Not Found E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? I believe we have bypassed the proxy, so I'm not sure why I'm getting '404 file not found'.
33 Answers
The first procedure you followed is correct
sudo apt-get -y install python3-pip But before installing try to update using command
sudo apt-get update If first did not work then you can also do this using curl
curl "" -o "get-pip.py" python3 get-pip.py --user Then to verify installation try
pip3 --help For checking version :
pip3 --version I fixed such problem by changing Server in "Software & Updates" -> Download from: there I chose different address and 404 disappeared.
1what worked for me
curl -sS >>setup.py python3 setup.py 
