t001z

For starters, I think you should be posting this in a different forum area, but here goes... Are you trying to run this on the Unraid Server, Linux VM or a Docker container? Docker containers are based on Linux but they are by no means a full blown installation of Linux. Docker containers are updated through a method to update the actual container (such as http://<unraid-server-ip-address>/Docker/), not apt-get or yum which will add libraries, applications up to/including kernel upgrades for full blown Linux installations. Docker containers are built for a specific purpose and are not meant to add functionality unless you are going to rebuild. If you are trying to run this on the unraid server itself, you are definitely posting in the wrong area and I won't even try to go further. If you are trying this on a Linux VM, check to find out which distro your VM is built on - Debian-based (including Ubuntu) uses apt-get while RPM-based (including CentOS & RedHat) uses yum.

... also make sure you have either stopped or removed gfjardim's container as they will both try to use port 631 for their admin pages.

Check step 6 in my instructions above. I may not have described it very well but you need to boot your unraid server into the GUI mode. Then from within the GUI on the server (not connecting to it from a different computer), access the CUPSd Administration page at http://127.0.0.1:631/ - this will allow you to enable remote administration.

It sounds like the area where you are getting stuck is on remote administration (step 6 below). Here is what I did to get that opened from the beginning: The configuration that I set involved first removing gfjardims-CUPS app - I am not sure if this was required but since they both needed the same port 631, this made logical sense to me. Install the container Then I set a network type as HOST Next I created a "Add another Path, Port, Variable, Label or Device" - with the following parameters Config Type: Port Name: Host Port 1 Host Port: 631 Connection Type: TCP Description: Container Port: 631 Switch to "Advanced View" at the top right and enter the "WebUI:" - in my case this was http://<<unraid-server-ip>:631/ *** In order to access the WebUI remotely, open the web application *on the UNRAID-GUI* (then you can launch CUPSd at 127.0.0.1:631). Click Administration (default user/pass is print/print) Check the box next to "Allow remote administration" to enable you to access the WebUI from any other system on your network. Also check the box next to "Share printers connected to this system" if needed Set up your printers that you want to share out through CUPSd If you update the Docker App through http://<<unraid-server-ip>/Docker, you will have to perform steps #6 & #7 again in order to access the page remotely and set up your printers. This is by no means a perfect system, it is just what I did to make it work and now I have a system that is working well and updated. It would be awesome if someone who knows more than I about docker containers or just unraid configuration wrote this into a supported app/container.

Yeah, after posting this and continuing to read more about the CUPS Docker App, I figured it was probably a dead development. I decided to look elsewhere and just grabbed one of the many docker builds of CUPS. The one I chose is a very adequate replacement and with a little tinkering works very well with UNRAID. I chose olbat's CUPSd which is available at https://hub.docker.com/r/olbat/cupsd/ and contains a full compliment of drivers. It would be nice if gfjardims's App came out with a new release but if not, Olbat's is built on the latest stable build (2.2.8).

So the application hasn't been updated in quite some time (almost 2 years ago) and the version in the container is CUPS 2.1.3. The latest version on CUPS.org is CUPS 2.3b5. I am relatively new to UNRAID but simply curious if the app is being updated any longer. I use it to print from my Apple devices on my HP laser printers and up until iOS 12 everything worked great, since the iOS 12 upgrade, the devices can't find the printers. Any help or comments would be appreciated.