1、whereis python
whereis遍历PATH环境变量中给定的所有路径，标识每个包含可执行python命令的目录
python: /usr/bin/python3.6 /usr/bin/python3.6m /usr/bin/python /usr/bin/python2.7 /usr/bin/python.bak /usr/bin/python2.7-config /usr/lib/python3.6 /usr/lib/python2.7 /usr/lib64/python3.6 /usr/lib64/python2.7 /etc/python /usr/local/bin/python3.6 /usr/local/bin/python3.6m /usr/local/bin/python3.6-config /usr/local/bin/python3.6m-config /usr/local/bin/python3.7 /usr/local/bin/python3.7-config /usr/local/bin/python3.7m /usr/local/bin/python3.7m-config /usr/local/lib/python3.6 /usr/local/lib/python3.7 /usr/include/python3.6m /usr/include/python2.7 /usr/local/zaspace/code/makedataplat/env/bin/python /usr/local/zaspace/code/makedataplat/env/bin/python3.7 /usr/share/man/man1/python.1.gz
2、which python
查询当前使用的python 安装路径
3、指定python 安装虚拟环境
virtualenv -p /usr/local/bin/python3.7 env