AWS上のUbuntu 16.04 LTSにpipやPython3.6をインストール

AWS上のUbuntu 16.04 LTSにpip、Python3.6をインストールしました。

rootになる（sudo実行でもよいけど）

※事前に $ sudo passwd root でrootに入れるようにしておく。

$ su
Password:
#

pip3のインストール

# pip3 -V
The program 'pip3' is currently not installed. You can install it by typing:
apt install python3-pip
# apt install python3-pip
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package python3-pip
# apt update
...(log)...
# apt install python3-pip
...(log)...
Do you want to continue? [Y/n] Y
...(log)...
# pip3 -V
pip 8.1.1 from /usr/lib/python3/dist-packages (python 3.5)

pip2のインストール

# pip2 -V
The program 'pip2' is currently not installed. You can install it by typing:
apt install python-pip
# apt install python-pip
...(log)...
# pip2 -V
pip 8.1.1 from /usr/lib/python2.7/dist-packages (python 2.7)

python3.6のインストール（pipとpython3.6-devも）

# add-apt-repository ppa:jonathonf/python-3.6
...(log)...
# apt-get update
...(log)...
# apt-get install python3.6 python3.6-dev
...(log)...
# wget https://bootstrap.pypa.io/get-pip.py
...(log)...
# pip3 -V
pip 8.1.1 from /usr/lib/python3/dist-packages (python 3.5)
# python3.6 get-pip.py
Collecting pip
  Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB)
    100% |????????????????????????????????| 1.3MB 1.2MB/s
Installing collected packages: pip
  Found existing installation: pip 8.1.1
    Uninstalling pip-8.1.1:
      Successfully uninstalled pip-8.1.1
Successfully installed pip-9.0.1
# pip3 -V
bash: /usr/bin/pip3: No such file or directory
# pip -V
bash: /usr/bin/pip: No such file or directory
# /usr/local/bin/pip -V
pip 9.0.1 from /usr/local/lib/python3.6/dist-packages (python 3.6)

※上記の通り、get-pip.py を実行すると、以前インストールしたpipはアンインストールされます。

参考URL