I use Ubuntu 18.04 bionic and I get this error message when I try to install libpng12-dev package.
How can I solve it?
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1Welcome to askubuntu. Please take a moment to review What topics can I ask about here?, Your question is about a pre-release version and is expected to have issues. Some pre-release questions are considered on-topic see When are questions about “ubuntu+1” appropriate?. Instructions on filing a bug report are here – J. Starnes Jan 3 '18 at 4:17
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This question is not specific to the beta version as such - there is still no such package in 18.04. – Zanna♦ Aug 20 '18 at 9:42
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Possible duplicate of What does “Package <package> has no installation candidate” mean? – karel Aug 20 '18 at 11:02
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Voting to reopen - 18.04 is no longer pre-release, the question is still valid, and a trickle of users continue to encounter this. – user535733 Aug 26 '18 at 12:44
The package libpng12-dev was dropped after 16.04. It's been gone a long time.
Try libpng-dev.
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Thank you! I am not an Ubuntu expert and found it here: learnopencv.com/install-opencv3-on-ubuntu – user3486308 Jan 3 '18 at 4:24
