求助 Debian 7 返回 E: Sub-process /usr/bin/dpkg exited unexpectedly 错误。

求助！

在 sentris 购买了一个 64m 内存的便宜 vps ，选择了 debian-7.0-standard_7.0-3_amd64.tar.gz 系统，使用 putty 登录了 root 用户后，执行：

apt-get update

apt-get upgrade

结果有这句：

E: Sub-process /usr/bin/dpkg exited unexpectedly

就没更新完成，另外安装爱思爱思，按照教程输入命令后，也是返回这个结果，搭建失败。。

这个问题是因为内存太小了吗？还是因为我选的是 64 位系统？

求解决方法。。拜谢！

下面是代码：

Linux CT156 2.6.32-39-pve #1 SMP Wed Jun 24 06:39:42 CEST 2015 x86_64

The programs included with the Debian GNU/Linux system are free software;

the exact distribution terms for each program are described in the

individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent

permitted by applicable law.

Last login: Tue May 3 11:32:51 2016 from ********

root@CT156:~# apt-get update

Hit http://security.debian.org wheezy/updates Release.gpg

Hit http://security.debian.org wheezy/updates Release

Hit http://security.debian.org wheezy/updates/main amd64 Packages

Hit http://ftp.debian.org wheezy Release.gpg

Hit http://security.debian.org wheezy/updates/contrib amd64 Packages

Hit http://security.debian.org wheezy/updates/contrib Translation-en

Get:1 http://ftp.debian.org wheezy-updates Release.gpg [1554 B]

Hit http://security.debian.org wheezy/updates/main Translation-en

Hit http://ftp.debian.org wheezy Release

Get:2 http://ftp.debian.org wheezy-updates Release [151 kB]

Hit http://ftp.debian.org wheezy/main amd64 Packages

Hit http://ftp.debian.org wheezy/contrib amd64 Packages

Hit http://ftp.debian.org wheezy/contrib Translation-en

Hit http://ftp.debian.org wheezy/main Translation-en

Hit http://ftp.debian.org wheezy-updates/main amd64 Packages/DiffIndex

Get:3 http://ftp.debian.org wheezy-updates/contrib amd64 Packages [14 B]

Get:4 http://ftp.debian.org wheezy-updates/contrib Translation-en [14 B]

Hit http://ftp.debian.org wheezy-updates/main Translation-en/DiffIndex

Fetched 153 kB in 2s (58.3 kB/s)

Reading package lists... Done

root@CT156:~# apt-get upgrade

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following packages will be upgraded:

base-files cpio dpkg dselect isc-dhcp-client isc-dhcp-common krb5-locales libc-bin libc6 libc6-i386

libdns88 libexpat1 libfreetype6 libgcrypt11 libgnutls-openssl27 libgnutls26 libgssapi-krb5-2 libgssrpc4

libisc84 libisccc80 libisccfg82 libk5crypto3 libkadm5clnt-mit8 libkadm5srv-mit8 libkdb5-6 libkrb5-3

libkrb5support0 libldap-2.4-2 liblwres80 libpng12-0 libssl1.0.0 libxml2 locales multiarch-support

openssh-client openssh-server openssl perl perl-base perl-modules rpcbind ssh ssl-cert tzdata 44 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Need to get 0 B/41.0 MB of archives.

After this operation, 1118 kB of additional disk space will be used.

Do you want to continue [Y/n]? Y

Extracting templates from packages: 100%

Preconfiguring packages ...

E: Sub-process /usr/bin/dpkg exited unexpectedly