每次我使用 Ubuntu 软件中心安装或卸载时都会收到此消息：
Package Operation Failed
The installation or removal of the software package failed.
每次下载完成后都会出现这种情况，但当我单击“确定”时，似乎我下载的内容仍然存在
例子：
installArchives() failed: Selecting previously unselected package libdc5:i386.
(Reading database ...
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(Reading database ... 191527 files and directories currently installed.)
Preparing to unpack .../libdc5_0.3.24~svn3121-2_i386.deb ...
Unpacking libdc5:i386 (0.3.24~svn3121-2) ...
Selecting previously unselected package libqt4-qt3support:i386.
Preparing to unpack .../libqt4-qt3support_4%3a4.8.5+git192-g085f851+dfsg-
2ubuntu4_i386.deb ...
Unpacking libqt4-^^^^qt3support:i386 (4:4.8.5+git192-g085f851+dfsg-2ubuntu4) ...
Selecting previously unselected package valknut.
Preparing to unpack .../valknut_0.4.9-2ubuntu1_i386.deb ...
Unpacking valknut (0.4.9-2ubuntu1) ...
Selecting previously unselected package valknut-translations.
Preparing to unpack .../valknut-translations_0.4.9-2ubuntu1_all.deb ...
Unpacking valknut-translations (0.4.9-2ubuntu1) ...
Processing triggers for gnome-menus (3.10.1-0ubuntu2) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu1) ...
Processing triggers for bamfdaemon (0.5.1+14.04.20140409-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for mime-support (3.54ubuntu1) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for menu (2.1.46ubuntu1) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Setting up mandos-client (1.6.0-1) ...
Note: Due to entropy requirements, key generation could take
anything from a few minutes to SEVERAL HOURS. Please be
patient and/or supply the system with more entropy if needed.
Started: Thu Dec 18 19:18:41 PST 2014
gpg: WARNING: some OpenPGP programs can't handle a DSA key with this digest size
.+++++++++++++++++++++++++++++++++++..++++++++++.+++++++++++++++++++++++++...++++++++++.++++++++++.+++++.+++++.+++++.++++++++++.++++++++++..++++++++++.+++++.+++++
...+++++............................................................................................+++++
++++++++++...++++^^^^+.+++++.+++++++++++++++....+++++.....+++++++++++++++..+++++++++++++++++>++++++++++++++++++.+++++..++++++++++.++++++++++...++++++++++++++++++++....+++++.+++++..++++++++++.+++++......+++++..........+++++
gpg: fatal: can't open `/tmp/mandos-keygen-keyrings.tCwFYmaNzz/trustdb.gpg': No such >file or directory
secmem usage: 3424/4896 bytes in 8/14 blocks of pool 5760/32768
dpkg: error processing package mandos-client (--configure):
subprocess installed post-installation script returned error exit status 2
Setting up libdc5:i386 (0.3.24~svn3121-2) ...
Setting up libqt4-qt3support:i386 (4:4.8.5+git192-g085f851+dfsg-2ubuntu4) ...
Setting up valknut (0.4.9-2ubuntu1) ...
Setting up valknut-translations (0.4.9-2ubuntu1) ...
Processing triggers for libc-bin (2.19-0ubuntu6.4) ...
Processing triggers for menu (2.1.46ubuntu1) ...
Errors were encountered while processing:
mandos-client
Error in function:
Setting up mandos-client (1.6.0-1) ...
Note: Due to entropy requirements, key generation could take
anything from a few minutes to SEVERAL HOURS. Please be
patient and/or supply the system with more entropy if needed.
Started: Thu Dec 18 19:20:20 PST 2014
gpg: WARNING: some OpenPGP programs can't handle a DSA key with this digest size
+++++++++++++++.++++++++++..+++++++++++++++..+++++..++++++++++..+++++++++++++++..+++++.++++++++++..+++++.+++++..+++++....+++++....+++++.+++++++++++++++.....+++++...+++++.+++++......+++++..............+++++
+++++..............................................................................
+++++.........+++++.........................................................................+++++<+++++...................+++++
++++++++++.+++++.+++++++++++++++..+++++.+++++.+++++++++++++++..+++++.+++++++++++++++.+++++++++++++++.++++++++++.+++++.++++++++++.+++++++++++++++++++++++++.+++++>++++++++++...........>+++++.........+++++
gpg: fatal: can't open `/tmp/mandos-keygen-keyrings.O6N6nUJILO/trustdb.gpg': No such >file or directory
secmem usage: 3424/4896 bytes in 8/14 blocks of pool 5728/32768
dpkg: error processing package mandos-client (--configure):
subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
我跑了sudo dpkg --configure -a：
Setting up mandos-client (1.6.0-1) ...
Note: Due to entropy requirements, key generation could take
anything from a few minutes to SEVERAL HOURS. Please be
patient and/or supply the system with more entropy if needed.
Started: Thu Dec 18 19:48:32 PST 2014
gpg: WARNING: some OpenPGP programs can't handle a DSA key with this digest size
.+++++++++++++++++++++++++++++++++++..++++++++++.+++++++++++++++++++++++++...++++++++++.++++++++++.+++++.+++++.+++++.++++++++++.++++++++++..++++++++++.+++++.+++++
...+++++............................................................................................+++++
++++++++++...++++^^^^+.+++++.+++++++++++++++....+++++.....+++++++++++++++..+++++++++++++++++>++++++++++++++++++.+++++..++++++++++.++++++++++...++++++++++++++++++++....+++++.+++++..++++++++++.+++++......+++++..........+++++
gpg: fatal: can't open `/tmp/mandos-keygen-keyrings.e8PUgDtyvI/trustdb.gpg': No such file or directory
secmem usage: 3424/4896 bytes in 8/14 blocks of pool 5760/32768
dpkg: error processing package mandos-client (--configure):
subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
mandos-client
结果sudo apt-get upgrade：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up mandos-client (1.6.0-1) ...
Note: Due to entropy requirements, key generation could take
anything from a few minutes to SEVERAL HOURS. Please be
patient and/or supply the system with more entropy if needed.
Started: Thu Dec 18 19:14:12 PST 2014
gpg: WARNING: some OpenPGP programs can't handle a DSA key with this digest size
++++++++++..+++++.+++++.+++++++++++++++..++++++++++.........+++++..+++++++++++++++....++++++++++++++++++++...+++++++++++++++....+++++....+++++..+++++..+++++.+++++++++++++++.++>+++..+++++
++++++++++..++++++++++.+++++.+++++++++++++++++++++++++.+++++++++++++++.++++++++++..+++++++++++++++.++++++++++++++++++++.++++++++++..+++++++++++++++++++++++++++++++++++...........+++++.+++++...+++++...................+++++
gpg: fatal: can't open `/tmp/mandos-keygen-keyrings.hfuSU3sSIu/trustdb.gpg': No such >file or directory
secmem usage: 3424/4896 bytes in 8/14 blocks of pool 5728/32768
dpkg: error processing package mandos-client (--configure):
subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
mandos-client
E: Sub-process /usr/bin/dpkg returned an error code (1)
现在，似乎没有什么问题。我尝试了其他一些命令，例如sudo apt-get -f install，sudo apt-get clean和sudo apt-get auto clean
我也按照说明这里，但没有效果。
直到按照以下说明进行清除后，这种情况才开始发生升级时可用空间不足。
答案1
您是否尝试过清除 mandos-client？
$ sudo apt-get autoremove --purge mandos-client
这应该以干净的方式删除该包，以便您稍后安装。