我正在尝试安装Image Magick。
$ sudo apt-get install php5-imagick The following packages have unmet dependencies. php5-imagick: Depends: libfontconfig1 (>= 2.8.0) but 2.6.0-3 is to be installed Depends: libjpeg62 (>= 6b1) but 6b-14 is to be installed Depends: libltdl7 (>= 2.2.6b) but it is not installable Depends: libmagickcore3 (>= 8:6.6.0.4) but it is not installable Depends: libmagickwand3 (>= 8:6.6.0.4) but it is not installable 但是当我尝试安装丢失的包时，我得到这个：
$ sudo apt-get install libfontconfig1 libjpeg62 libltdl7 libmagickcore3 libmagickwand3 Reading package lists... Done Building dependency tree Reading state information... Done libfontconfig1 is already the newest version. libfontconfig1 set to manually installed. libjpeg62 is already the newest version. libjpeg62 set to manually installed. Package libltdl7 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package libltdl7 has no installation candidate
我如何解决这些问题？
我使用aptitude而不是apt-get，它提供了解决问题的选项，而不仅仅是失败。
Keep the following packages at their current version: php5-common [5.3.8-1~dotdeb.1 (oldstable, now)] php5-imagick [Not Installed]
^不是一个有用的第一个“解决scheme”，头脑。 然而第二个工作：
Install the following packages: php5-imagick [5.3.8-1~dotdeb.1 (oldstable)] Keep the following packages at their current version: php5-common [5.3.8-1~dotdeb.1 (oldstable, now)] Score is -9910 Accept this solution? [Y/n/q/?] Y