root@vps:~# apt-get install vim （安装任何软件都一样报错：如下）
E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct
the problem.

root@vps:~# dpkg --configure -a
Setting up libpam-cap:i386 (1:2.24-0ubuntu2) ...
Can't exec "/usr/share/debconf/frontend": Permission denied at /usr/share/perl5/
Debconf/Client/ConfModule.pm line 78.
VERSION 2.0

进程始终停留在：
Can't exec "/usr/share/debconf/frontend": Permission denied at /usr/share/perl5/
Debconf/Client/ConfModule.pm line 78.
VERSION 2.0