我尝试在Ubuntu 14.04 LTS，nginx上安装php5-fpm软件包。 但是我收到这个消息：
Reading package lists... Done Building dependency tree Reading state information... Done Package php5-fpm 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 'php5-fpm' has no installation candidate 我已经search了很多可能是错误的，有些答案指出并不是所有正确的path都在“sources.list”文件中。 我已取消注释path（URL）注释掉的行。 我的“sources.list”文件现在看起来像这样：
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to # newer versions of the distribution. deb http://se.archive.ubuntu.com/ubuntu/ trusty main restricted deb-src http://se.archive.ubuntu.com/ubuntu/ trusty main restricted ## Major bug fix updates produced after the final release of the ## distribution. deb http://se.archive.ubuntu.com/ubuntu/ trusty-updates main restricted deb-src http://se.archive.ubuntu.com/ubuntu/ trusty-updates main restricted ## NB software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team. Also, please note that software in universe WILL NOT receive any ## review or updates from the Ubuntu security team. deb http://se.archive.ubuntu.com/ubuntu/ trusty universe deb-src http://se.archive.ubuntu.com/ubuntu/ trusty universe deb http://se.archive.ubuntu.com/ubuntu/ trusty-updates universe deb-src http://se.archive.ubuntu.com/ubuntu/ trusty-updates universe ## NB software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team, and may not be under a free licence. Please satisfy yourself as to ## your rights to use the software. Also, please note that software in ## multiverse WILL NOT receive any review or updates from the Ubuntu ## security team. deb http://se.archive.ubuntu.com/ubuntu/ trusty multiverse deb-src http://se.archive.ubuntu.com/ubuntu/ trusty multiverse deb http://se.archive.ubuntu.com/ubuntu/ trusty-updates multiverse deb-src http://se.archive.ubuntu.com/ubuntu/ trusty-updates multiverse ## NB software from this repository may not have been tested as ## extensively as that contained in the main release, although it includes ## newer versions of some applications which may provide useful features. ## Also, please note that software in backports WILL NOT receive any review ## or updates from the Ubuntu security team. deb http://se.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse deb-src http://se.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse deb http://security.ubuntu.com/ubuntu trusty-security main restricted deb-src http://security.ubuntu.com/ubuntu trusty-security main restricted deb http://security.ubuntu.com/ubuntu trusty-security universe deb-src http://security.ubuntu.com/ubuntu trusty-security universe deb http://security.ubuntu.com/ubuntu trusty-security multiverse deb-src http://security.ubuntu.com/ubuntu trusty-security multiverse ## Uncomment the following two lines to add software from Canonical's ## 'partner' repository. ## This software is not part of Ubuntu, but is offered by Canonical and the ## respective vendors as a service to Ubuntu users. deb http://archive.canonical.com/ubuntu saucy partner deb-src http://archive.canonical.com/ubuntu saucy partner ## This software is not part of Ubuntu, but is offered by third-party ## developers who want to ship their latest software. deb http://extras.ubuntu.com/ubuntu trusty main deb-src http://extras.ubuntu.com/ubuntu trusty main
为什么我不能安装“php5-fpm”，我该如何解决？
我认为你忘了做apt-get update因为一切似乎都没有问题。