使用apt-get install 的时候报下面错误，莫名其妙的执行了一些命令并报错。
# apt-get install wget
Reading package lists... Done
Building dependency tree
Reading state information... Done
wget is already the newest version (1.17.1-1ubuntu1.5).
0 upgraded, 0 newly installed, 0 to remove and 237 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 berta (16756od) ...
+ rm -rf /tmp/berta
+ mkdir -p /tmp/berta
+ '[' -f /etc/berta.ini ']'
+ rm -f /opt/berta/berta
+ ln -s . /opt/berta/berta
ln: failed to create symbolic link '/opt/berta/berta': No such file or directory
dpkg: error processing package berta (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
berta
E: Sub-process /usr/bin/dpkg returned an error code (1)
解决方法：
cd /var/lib/dpkg
sudo mv info info.bak
sudo apt-get update
通过全局搜索“rm -rf /tmp/berta”，发现果然是/var/lib/dpkg/info下存在莫名其妙的命令：
# grep -r "rm \-rf \/tmp\/berta" var/
var/lib/dpkg/info/berta.postinst:rm -rf /tmp/berta
var/lib/dpkg/info/berta.postinst:#rm -rf /tmp/berta
var/crash/berta.0.crash: + rm -rf /tmp/berta
var/crash/berta.0.crash: + rm -rf /tmp/berta
var/crash/berta.0.crash: + rm -rf /tmp/berta
var/crash/berta.0.crash: + rm -rf /tmp/berta
var/crash/berta.0.crash: + rm -rf /tmp/berta
var/crash/berta.0.crash: + rm -rf /tmp/berta
var/crash/berta.0.crash: + rm -rf /tmp/berta
var/crash/berta.0.crash: + rm -rf /tmp/berta
var/crash/berta.0.crash: + rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/apt/term.log:+ rm -rf /tmp/berta
var/log/unattended-upgrades/unattended-upgrades-dpkg.log:+ rm -rf /tmp/berta
var/log/unattended-upgrades/unattended-upgrades-dpkg.log:+ rm -rf /tmp/berta
var/log/unattended-upgrades/unattended-upgrades-dpkg.log:+ rm -rf /tmp/berta
var/log/unattended-upgrades/unattended-upgrades-dpkg.log:+ rm -rf /tmp/berta
var/log/unattended-upgrades/unattended-upgrades-dpkg.log:+ rm -rf /tmp/berta
var/log/unattended-upgrades/unattended-upgrades-dpkg.log:+ rm -rf /tmp/berta
var/log/unattended-upgrades/unattended-upgrades-dpkg.log:+ rm -rf /tmp/berta
var/log/unattended-upgrades/unattended-upgrades-dpkg.log:+ rm -rf /tmp/berta