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How can I download CatLight for Ubuntu 18.04 LTS?

How can I download CatLight for Ubuntu 18.04 LTS?

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Didn't work for me either:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Note, selecting 'catlight' instead of './CatLightSetup-2.19.1.deb'
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 catlight : Depends: libicu52 but it is not installable
E: Unable to correct problems, you have held broken packages.
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I tried "sudo apt install ./CatLightSetup-2.19.1.deb" on a pretty fresh Ubuntu 18.04 install.

Try installing libicu52 before installing the app:

https://askubuntu.com/questions/722075/no-installation-candidate-for-libicu52-on-15-10 

It is not installable, so I assume there are good reasons why the package is not available anymore. I won't install it.

Have you experienced any problem with running a version for Ubuntu 16 on Ubuntu 18?

https://catlight.io/downloads

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Hopefully this experience helps another.

Here's the issues and how I resolved it by installing a dependency manually.   

I wasn't able to download CatLight's Debian file and install it properly out of the gate!  I had to resort to installing a missing dependency file to continue my installation process; see below please...
sudo apt install ./CatLightSetup-2.18.5.deb                                   
Reading package lists... Done                                                                    
Building dependency tree                                                                                      
Reading state information... Done                                                                                                      
Note, selecting 'catlight' instead of './CatLightSetup-2.18.5.deb'                                          
Some packages could not be installed. This may mean that you have                                          
requested an impossible situation or if you are using the unstable                                     
distribution that some required packages have not yet been created                                                        
or been moved out of Incoming.                                                                                                                                                             
The following information may help to resolve the situation:                                                                                                                                           
                                                                                                                                                                                           
The following packages have unmet dependencies:                                                                                                                                                  
 catlight : Depends: libicu52 but it is not installable  
 
I found a quick fix by searching the error and ran into this older discussion.   URL Source: https://askubuntu.com/questions/722075/no-installation-candidate-for-libicu52-on-15-10
After applying, then I could do a proper installation like the below:
sudo apt install /tmp/mozilla_luke0/CatLightSetup-2.18.5.deb
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