1.安装python3.8
很简单，不用解释了，照着下面操作就可以了 wget https://www.python.org/ftp/python/3.8.12/Python-3.8.12.tgz tar zxvf Python-3.8.12.tgz -C ./ cd Python-3.8.12/ ./configure --prefix=/usr/local/python3.8 make make install
cd /usr/local/python3.8/bin ls ./python3.8 quit()
为python3.8建立软连接，首先查看建立之前 /usr/bin/ 目录下的情况： ln -s /usr/local/python3.8/bin/python3.8 /usr/bin/python3.8 ln -s /usr/local/python3.8/bin/pip3.8 /usr/bin/pip3.8
python3.8 quit()2.离线安装依赖包
zhirong.gong@CDYF21:~/200G/python38-wheel$ python3.8 -m pip install crypto-1.4.1-py2.py3-none-any.whl
Defaulting to user installation because normal site-packages is not writeable
Processing ./crypto-1.4.1-py2.py3-none-any.whl
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('
这里遇到两个报错：
第一个是site-packages不可写入，解决方法是加上--target=/usr/local/lib/python3.8/dist-packages
如：
python3.8 -m pip install paramiko-2.8.0-py2.py3-none-any.whl --target=/usr/local/lib/python3.8/dist-packages
第二个是Failed to establish a new connection: [Errno -3] 域名解析暂时失败，解决方法是加上 --no-index
如：
python3.8 -m pip install cryptography-3.3-cp36-abi3-manylinux2010_x86_64.whl --no-index
接下来继续安装，又遇到一个报错
ERROR: Could not install packages due to an OSError: [Errno 13] 权限不够: '_constant_time.abi3.so'
Consider using the `--user` option or check the permissions.
解决方法是加上 --user
如：
python3.8 -m pip install cryptography-3.3-cp36-abi3-manylinux2010_x86_64.whl --no-index --user
（pip默认将Python包安装到系统目录(例如/usr/local/lib/python3.8).这需要root访问权限.
–user会在您的主目录中生成pip安装包,而不需要任何特殊权限.）
