I am working on a Ubuntu 12.04.2 LTS (GNU/Linux 3.5.0-43-generic x86_64) machine. It is a server running in production environment with other projects so I have to be quite careful.I have to install a certain list of programs, so first I run the usual apt-get update and then I proceeded to run the following command:apt-get install python-dev libxslt1-dev libpq-dev git python-pip nginx supervisor wget libxml2-dev mongodb build-essential libxslt1-dev libxrender1 libxext6`This is what I get:root@SERVERLINUX:~# apt-get install python-dev libxslt1-dev libpq-dev git python-pip nginx supervisor wget libxml2-dev mongodb build-essential libxslt1-dev libxrender1 libxext6Reading package lists... DoneBuilding dependency tree       Reading state information... Donegit is already the newest version.python-pip is already the newest version.build-essential is already the newest version.libxext6 is already the newest version.libxrender1 is already the newest version.libxrender1 set to manually installed.python-dev is already the newest version.You might want to run 'apt-get -f install' to correct these:The following packages have unmet dependencies: libpq-dev : Depends: libpq5 (= 9.1.14-0ubuntu0.12.04) but 9.1.9-0ubuntu12.04 is to be installed             Depends: libkrb5-dev but it is not going to be installed             Depends: comerr-dev but it is not going to be installed libxml2-dev : Depends: libxml2 (= 2.7.8.dfsg-5.1ubuntu4.9) but 2.7.8.dfsg-5.1ubuntu4.6 is to be installed linux-image-generic-lts-quantal : Depends: linux-image-3.5.0-44-generic but it is not going to be installed mongodb : Depends: mongodb-server but it is not going to be installed           Depends: mongodb-dev but it is not going to be installed nginx : Depends: nginx-full but it is not going to be installed or                  nginx-light but it is not going to be installed supervisor : Depends: python-medusa (>= 0.5.4) but it is not going to be installed              Depends: python-meld3 but it is not going to be installed              Depends: python-support (>= 0.90.0) but it is not going to be installedE: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).What should I do to manage to install the packages with unmet dependencies? HOw can I meet those dependencies? I am afraid to use the -f option as suggested because it might just mess everything up.Please bear with me, I just want to be extra cautious before taking any risk in this server.
Unmet dependencies using apt-get on Ubuntu
ubuntu;software installation;apt