printer
 

I am running LinuxMint LTS. When first installed the OS, it saw my HP Officejet 5600 and installed it as well, and everything worked fine, for a long while. Now for some reason it won't even open the program. Even went to CUPS and tried to install it again, and no luck. (is CUPS going out of business, there is no link to their forum.)
I tried to find a program to un-install the printer program, so I could re-install it, But not familiar enough with linux yet, for that. Can anybody help me with these issues?

You want HPLIP. It's in the Mint software repositories.

Note that the HPLIP GUI (hp-toolbox) is often a separate package.

Here's where you'll find the web interface for cups: http://localhost:631/

You can un-install and reinstall a printer with this. If you get nothing when pressing on the link, then restart cups:

printer help sorta fix
 

It didn't fix yhe problem with-in the OS. But installed a separate program to operate the printer, with an icon in the clock side of the menu bar. Not to be fussy, but it would be nice if it worked from the Os as well. Right now when I click on,,,,Administration > Printer,,,nothing happens.

How is it connected?

The printer configuration tool i.e when you click on Administration->Printer is provided by the OS/desktop and not part of CUPS. What happens when you run system-config-printer from a terminal window?

An alternate way as previously suggested is to configure the printer through the cups configuration web pages i.e. http://localhost:631. You can verify the spooler is enabled and try printing a test page.

cups (cups.org) is now owned by Apple so it is still very much in business...

I get a "invalid systax"

You get an invalid syntax doing what?

I use XUbuntu with HP printers. I suspect Mint has the same problem that XUbuntu does as they are both offshoots of Ubuntu itself. I have found the easiest thing for me to do is to start by purging Ubuntu's version of HPLIP (sudo apt-get purge hplip). Then download the HPLIP automatic installer from HPLIP itself, NOT Ubuntu etc. Install HP's HPLIP, then install the printer. If I do those three things I find I have no problems with my HP printers. Note that during the installation HPLIP will still say it has found a copy of HPLIP, should it remove it? Say 'yes' and let it do its thing. I don't know if there is something the purge leaves behind or not, but I suspect that is the case. When I do this all the problems seem to disappear.