我正在关注这里的快照教程：
snap安装好...
user001@laptop:~$ sudo snap install classic --edge --devmode
classic (edge) 16.04 from 'canonical' installed
我一开始就遇到了问题。当我尝试进入经典快照时......
user001@laptop:~$ sudo classic
[sudo] password for user001:
mount: devpts is already mounted or /dev/pts busy
devpts is already mounted on /dev/pts
sudo: unknown user: user001
sudo: unable to initialize policy plugin
我找不到任何关于此的信息。关于解决问题的任何建议？