ubuntu下dpkg错误清除不了

/bin/sh: 1: /usr/sbin/dpkg-preconfigure: not found
dpkg: error processing package x11-common (--configure):
package is in a very bad inconsistent state; you should
reinstall it before attempting configuration
Setting up vsftpd (3.0.2-1ubuntu2.14.04.1) ...
vsftpd user (ftp) already exists, doing nothing.


vsftpd directory (/srv/ftp) already exists, doing nothing.
/var/lib/dpkg/info/vsftpd.postinst: 55: /var/lib/dpkg/info/vsftpd.postinst: invoke-rc.d: not found
dpkg: error processing package vsftpd (--configure):
subprocess installed post-installation script returned error exit status 127
Errors were encountered while processing:
x11-common
vsftpd
E: Sub-process /usr/bin/dpkg returned an error code (1)




买了阿里云服务器 ubuntu操作系统 现在的情况是 所有操作都进行不了 包括apt-get 本人新手 求助啊