当我尝试在我的Ubuntu 14.04上安装php5-curl时，我遇到了这个问题。 我跑了： sudo apt-get install php5-curl得到：
Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: cpp-4.9 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed g++-4.9 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed gcc-4.9 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libasan1 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libatomic1 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libcilkrts5 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libgcc-4.9-dev : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libgcc1 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libgomp1 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libitm1 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed liblsan0 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libquadmath0 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libstdc++-4.9-dev : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libstdc++6 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libtsan0 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed libubsan0 : Depends: gcc-4.9-base (= 4.9.1-16ubuntu6) but it is not going to be installed php5-curl : Depends: phpapi-20121212 Depends: php5-common (= 5.5.9+dfsg-1ubuntu4.14) but 5.6.13+dfsg-1+deb.sury.org~trusty+3 is to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
但是，当我运行apt-get -f install我得到一个消息，当我继续…：
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: dbconfig-common gyp libauthen-pam-perl libc-ares-dev libc-ares2 libio-pty-perl libjs-node-uuid libopendkim9 librbl1 libunbound2 libvbr2 php-gettext Use 'apt-get autoremove' to remove them. The following extra packages will be installed: gcc-4.9-base libgcc1 The following packages will be REMOVED: apache2 apache2-bin apport apt apt-show-versions apt-transport-https apt-utils apt-xapian-index aptitude build-essential byobu clamav clamav-daemon clamav-freshclam clamsmtp command-not-found cpp cpp-4.9 g++ g++-4.8 g++-4.9 gcc gcc-4.8 gcc-4.9 gettext-base groff-base grub-common grub-gfxpayload-lists grub-pc grub-pc-bin grub2-common landscape-common language-selector-common libapache2-mod-php5 libapt-inst1.5 libapt-pkg-perl libapt-pkg4.12 libasan1 libasprintf0c2 libatomic1 libboost-iostreams1.54.0 libboost-iostreams1.55.0 libcilkrts5 libclamav6 libcwidget3 libept1.4.12 libgcc-4.8-dev libgcc-4.9-dev libgmp-dev libgmpxx4ldbl libgomp1 libicu52 libitm1 libllvm3.5 liblsan0 liblua5.1-0 libmemcached10 libmemcached11 libopendbx1 libopendbx1-sqlite3 libquadmath0 libsigc++-2.0-0c2a libstdc++-4.8-dev libstdc++-4.9-dev libstdc++6 libtsan0 libubsan0 libv8-3.14-dev libv8-3.14.5 libxapian22 lshw man-db mysql-server mysql-server-5.5 mysql-server-core-5.5 node-abbrev node-ansi node-ansi-color-table node-archy node-async node-block-stream node-combined-stream node-cookie-jar node-delayed-stream node-forever-agent node-form-data node-fstream node-fstream-ignore node-github-url-from-git node-glob node-graceful-fs node-gyp node-inherits node-ini node-json-stringify-safe node-lockfile node-lru-cache node-mime node-minimatch node-mkdirp node-mute-stream node-node-uuid node-nopt node-normalize-package-data node-npmlog node-once node-osenv node-qs node-read node-read-package-json node-request node-retry node-rimraf node-semver node-sha node-sigmund node-slide node-tar node-tunnel-agent node-underscore node-which nodejs nodejs-dev npm opendkim opendkim-tools php5 php5-intl phpmyadmin pppoeconf python-apt python-xapian python3-apport python3-apt python3-commandnotfound python3-distupgrade python3-software-properties python3-update-manager re2c ruby-dev ruby-full ruby2.1-dev sa-compile tasksel tasksel-data telnet thermald ubuntu-minimal ubuntu-release-upgrader-core ubuntu-standard unattended-upgrades update-manager-core update-notifier-common webmin The following NEW packages will be installed: gcc-4.9-base The following packages will be upgraded: libgcc1 WARNING: The following essential packages will be removed. This should NOT be done unless you know exactly what you are doing! apt libapt-pkg4.12 (due to apt) libstdc++6 (due to apt) 1 upgraded, 1 newly installed, 154 to remove and 0 not upgraded. Need to get 54.3 kB of archives. After this operation, 543 MB disk space will be freed. You are about to do something potentially harmful. To continue type in the phrase 'Yes, do as I say!'
我想这是不好的，删除它们…这是在我的/etc/apt/sources.list ：
###### Ubuntu Main Repos deb http://nl.archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse deb-src http://nl.archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse ###### Ubuntu Update Repos deb http://nl.archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse deb http://nl.archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse deb-src http://nl.archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse deb-src http://nl.archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse ###### Ubuntu Partner Repo deb http://archive.canonical.com/ubuntu trusty partner deb-src http://archive.canonical.com/ubuntu trusty partner
什么可能导致这些依赖性错误？
我希望你能帮助我。 如果你需要更多的信息，请问。
提前致谢！
不幸的是，我无法发现错误的原因，也没有一个简单的提示。 我做了系统的快照，并备份了我想要恢复的必要数据和设置，并完全重新安装。 花了我一些时间来恢复所有，但有一个好处：我现在有一个干净整洁的系统，没有任何错误。