我想在服务器上安装openssh-server，但它显示了我：
apt-get install openssh-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
openssh-server is already the newest version.
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
upstart : Depends: ifupdown (>= 0.6.10ubuntu5)
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
当我尝试 apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
python-numpy python-gobject-2 python-gobject-dev libpython2.7 docbook-xml
docbook-xsl python-dev libgirepository-1.0-1 liblapack3gf libffi-dev
libquadmath0 libffi5 python-gi libssl-dev python2.6-dev libglade2-0
libblas3gf gir1.2-glib-2.0 python-gobject sgml-data libgfortran3
python2.7-dev
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
ifupdown
Suggested packages:
ppp rdnssd
The following packages will be upgraded:
ifupdown
1 upgraded, 0 newly installed, 0 to remove and 325 not upgraded.
9 not fully installed or removed.
Need to get 0 B/48.3 kB of archives.
After this operation, 43.0 kB disk space will be freed.
Do you want to continue [Y/n]? y
y
Reading changelogs... Done
debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to frontend: Readline
dpkg: dependency problems prevent configuration of plymouth:
plymouth depends on upstart-job; however:
Package upstart-job is not installed.
Package upstart which provides upstart-job is not configured yet.
plymouth depends on udev (>= 166-0ubuntu4); however:
Package udev is not configured yet.
dpkg: error processing plymouth (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of mountall:
mountall depends on udev; however:
Package udev is not configured yet.
mountall depends on plymouth; however:
Package plymouth is not configured yet.
dpkg: error processing mountall (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of initscripts:
initscripts depends on upstart; however:
Package upstart is not configured yet.
initscripts depends on mountall (>= 2.28); however:
Package mountall is not configured yet.
dpkg: error processing initscripts (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
No apport report written because the error message indicates its a followup error from a previous failure.
No apport report written because the error message indicates its a followup error from a previous failure.
Errors were encountered while processing:
plymouth
mountall
initscripts
E: Sub-process /usr/bin/dpkg returned an error code (1)
因此，我尝试使用安装deb文件，dpkg -i --force-overwrite但再次向我显示错误。
lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 6.0.10 (squeeze)
Release: 6.0.10
Codename: squeeze
apt-cache策略
Package files:
100 /var/lib/dpkg/status
release a=now
500 http://ftp.debian.org/debian/ jessie-backports/main Translation-en
100 http://ftp.debian.org/debian/ jessie-backports/main i386 Packages
release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=main
origin ftp.debian.org
100 http://ftp.debian.org/debian/ jessie-backports/main amd64 Packages
release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=main
origin ftp.debian.org
500 http://deb.debian.org/debian-security/ stable/updates/main Translation-en
500 http://deb.debian.org/debian-security/ stable/updates/main i386 Packages
release v=8,o=Debian,a=stable,n=jessie,l=Debian-Security,c=main
origin deb.debian.org
500 http://deb.debian.org/debian-security/ stable/updates/main amd64 Packages
release v=8,o=Debian,a=stable,n=jessie,l=Debian-Security,c=main
origin deb.debian.org
500 http://deb.debian.org/debian/ stable-updates/non-free Translation-en
500 http://deb.debian.org/debian/ stable-updates/main Translation-en
500 http://deb.debian.org/debian/ stable-updates/contrib Translation-en
500 http://deb.debian.org/debian/ stable-updates/non-free i386 Packages
release o=Debian,a=stable-updates,n=jessie-updates,l=Debian,c=non-free
origin deb.debian.org
500 http://deb.debian.org/debian/ stable-updates/contrib i386 Packages
release o=Debian,a=stable-updates,n=jessie-updates,l=Debian,c=contrib
origin deb.debian.org
500 http://deb.debian.org/debian/ stable-updates/main i386 Packages
release o=Debian,a=stable-updates,n=jessie-updates,l=Debian,c=main
origin deb.debian.org
500 http://deb.debian.org/debian/ stable-updates/non-free amd64 Packages
release o=Debian,a=stable-updates,n=jessie-updates,l=Debian,c=non-free
origin deb.debian.org
500 http://deb.debian.org/debian/ stable-updates/contrib amd64 Packages
release o=Debian,a=stable-updates,n=jessie-updates,l=Debian,c=contrib
origin deb.debian.org
500 http://deb.debian.org/debian/ stable-updates/main amd64 Packages
release o=Debian,a=stable-updates,n=jessie-updates,l=Debian,c=main
origin deb.debian.org
500 http://deb.debian.org/debian/ stable/non-free Translation-en
500 http://deb.debian.org/debian/ stable/main Translation-fr
500 http://deb.debian.org/debian/ stable/main Translation-en
500 http://deb.debian.org/debian/ stable/contrib Translation-en
500 http://deb.debian.org/debian/ stable/non-free i386 Packages
release v=8.8,o=Debian,a=stable,n=jessie,l=Debian,c=non-free
origin deb.debian.org
500 http://deb.debian.org/debian/ stable/contrib i386 Packages
release v=8.8,o=Debian,a=stable,n=jessie,l=Debian,c=contrib
origin deb.debian.org
500 http://deb.debian.org/debian/ stable/main i386 Packages
release v=8.8,o=Debian,a=stable,n=jessie,l=Debian,c=main
origin deb.debian.org
500 http://deb.debian.org/debian/ stable/non-free amd64 Packages
release v=8.8,o=Debian,a=stable,n=jessie,l=Debian,c=non-free
origin deb.debian.org
500 http://deb.debian.org/debian/ stable/contrib amd64 Packages
release v=8.8,o=Debian,a=stable,n=jessie,l=Debian,c=contrib
origin deb.debian.org
500 http://deb.debian.org/debian/ stable/main amd64 Packages
release v=8.8,o=Debian,a=stable,n=jessie,l=Debian,c=main
origin deb.debian.org
Pinned packages:
任何的想法 ？
您可能需要尝试清除安装并进行一些清理。
尝试：
sudo apt-get remove openssh-server openssh-client --purge && sudo apt-get autoremove && sudo apt-get autoclean && sudo apt-get update
如果您没有任何理由不升级软件包，请尝试：
sudo apt-get dist-upgrade
然后，您可以尝试再次安装软件包，以查看是否可以解决问题：
sudo apt-get install openssh-server openssh-client
编辑：
注意ubuntu该错误中引用了：upstart : Depends: ifupdown (>= 0.6.10ubuntu5)
检查您的sources.list文件和sources.list.d目录文件，以获取对ubuntu。如果有注释掉，然后再次尝试上述命令。
如果安装了任何ubuntuPPA或ubuntu.deb软件包，这也会引起问题。
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