That version is now dead
http://news.softpedia.com/news/ubuntu-17-04-zesty-zapus-has-reached-end-of-life-upgrade-to-ubuntu-17-10-now-519360.shtml
** Changed in: imagemagick (Ubuntu)
Status: New => Invalid
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** Tags removed: need-duplicate-check
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https://bugs.launchpad.net/bugs/1697451
Title:
package imagemagick-6.q16 8:6.9.7.4+dfsg-3ubuntu1.1 failed to
install/upgrade: subprocess
This seems to be the problem:
Setting up imagemagick-6.q16 (8:6.9.7.4+dfsg-3ubuntu1.1) ...
update-alternatives: error: cannot stat file '/usr/bin/firefox': Too many
levels of symbolic links
dpkg: error processing package imagemagick-6.q16 (--configure):
subprocess installed post-installation
Thanks for taking the time to report this bug and helping to make Ubuntu
better. We appreciate the difficulties you are facing, but this appears
to be a "regular" (non-security) bug. I have unmarked it as a security
issue since this bug does not show evidence of allowing attackers to
cross
