What are the steps to install MarkLogic 8 on Ubuntu 14.04?
Download RPM version for centos/redhat from marklogic official website. Need to install 'alien' to convert an RPM to DEB and install the DEB created.
sudo apt-get install alien
sudo alien --to-deb --verbose /home//Downloads/MarkLogic-RHEL7-8.0-5.4.x86_64.rpm
Install the deb:
sudo dpkg -i marklogic_8.0-6.4_amd64.deb
I have tested this on Ubuntu 16.04 (64 bit)