What are the necessary steps to change the default printer for individual users on a reasonably recent Linux system using CUPS? (i.e. not the system-wide default)The CUPS lpr manpage indicates that setting the PRINTER environment variable is looked to first  by the printing system. But does this also affect the default printer for GNOME & KDE applications?Does this also override whatever the user has changed by going to, for instance, the 'Printing' setup application in Ubuntu? Or the equivalent in RHED?How can I cover all my bases?
Controlling users' default printer as an administrator
linux;printing;cups
You can use lpoptions. See man lpoptions.The command looks likelpoptions -d myprinterand creates a line in  ~/.lpoptions (or on some systems ~/.cups/lpoptions) likeDefault myprinterSee Command-Line Printing and Options, section Setting the Default Printer.