命令行查找路径方法一：

which geckodriver

1.命令行查找路径方法二

echo $PATH
/home/username/miniconda3/envs/py3/bin:/home/username/miniconda3/condabin:/home/username/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/local/games

2.逐一列出环境变量下的子目录

ls miniconda3/envs/py3/bin:miniconda3/condabin:.local/bin:usr/local/sbin:usr/local/bin:usr/sbin:usr/bin:local/games:local/games