$ python2 -m pip install appdirs
Requirement already satisfied: appdirs in /home/root/.local/lib/python2.7/site-packages (1.4.3)
$ sudo python2 -m pip install appdirs
Requirement already satisfied: appdirs in /usr/local/lib/python2.7/dist-packages/appdirs-1.4.3-py2.7.egg (1.4.3)

$ sudo python2 -m pip install -r requirements.txt
...
[!]: 安装pentestdb失败，原因：No module named appdirs

$ pentest
无法找到配置文件 '/home/root/.config/pentestdb/pentestdb.conf'