query: E: Package 'libpng12-0' has no installation candidate (Ubuntu 17.04)
positive_passages.docid: 30571
positive_passages.text: E: Package 'libpng12-0' has no installation candidate [ubuntu 16.10 Gnome]
negative_passages.docid: 74366
negative_passages.text: Install apt package in ubuntu 12.04
negative_passages.docid: 6105
negative_passages.text: What is the easiest way to resolve apt-get BADSIG GPG errors?
negative_passages.docid: 132822
negative_passages.text: "E: Package ‘synaptic’ has no installation candidate" when trying to install synaptic
negative_passages.docid: 120521
negative_passages.text: Installing .pkg with terminal ?
negative_passages.docid: 88589
negative_passages.text: Can I install Portage, Pacman or other package managers on Ubuntu?
negative_passages.docid: 21062
negative_passages.text: dpkg: error: parsing file '/var/lib/dpkg/available' near line 0
negative_passages.docid: 73357
negative_passages.text: Every package "has no installation candidate"
negative_passages.docid: 29326
negative_passages.text: Can't install a package due to "Something wicked happened resolving" error
negative_passages.docid: 75071
negative_passages.text: failing to install oracle-java7-installer,displaying 'E: Sub-process /usr/bin/dpkg returned an error code (1)'
negative_passages.docid: 10845
negative_passages.text: How to solve "dpkg: error: 1 expected program not found in PATH or not executable"?
negative_passages.docid: 93827
negative_passages.text: Unable to locate package libsystemd-dev
negative_passages.docid: 60199
negative_passages.text: FGLRX won't install: Unable to correct problems, you have held broken packages
negative_passages.docid: 36886
negative_passages.text: How to install a deb file, by dpkg -i or by apt?
negative_passages.docid: 56150
negative_passages.text: Can't upgrade/update ubuntu 18.04 as apt/dpkg error is showing up
negative_passages.docid: 31793
negative_passages.text: The following packages have unmet dependencies!
negative_passages.docid: 78011
negative_passages.text: Unable to install package post adding ppa