CUPS is a widely-adopted printing system for Unix-like operating system including #Linux. It manages print queues in the local machine and can act as a client to pass those printing jobs to remote computers that works with the same underlying network printing protocol, 202205301808# (alternatives are SMB/CIFS and LPD).
All configuration files are stored inside the directory /etc/cups/. The file cups.conf contains lots of configuration options such as Browsing (enable browsing feature) and BrowsingAddress (where the browsing information should be sent and broadcasted). printers.conf on the other hand consists of printer definitions where additional options are further stored inside the directory /etc/cups/ppd with the format of 202205301819#.
Note: It is advised to just rely on the web-based utilities provided by CUPS package instead of manually editing the files unless you need to configure the web-based tool itself or the ability of CUPS to interface to other CUPS.
CUPS has its own set of smart filters that fit 202205301606# into the print queue which is especially useful in non-PostScript printer.
It has several programs such as lpr, lpq, lprm and lpc that help it on print queues management. All programs mentioned accepts the option -P where you can indicate which print queue should the program operate on.
The CLI tool lpr is particularly useful in #202205301557. The files to be printed usually submitted into the directory /var/spool/cups/ by the tool.
lpq can be used to display important print queue information such as number of files contained, file size, file owner, job number and so on.
The program lprm can removes job(s) depending on the syntax give. If it is passed with a number, it will treat that number as the job number of the job to be deleted. If a dash - is passed instead, the command will remove all the jobs related to the current user (for root user, it may remove all jobs).
lpc is used to control print queue.
Note: Use web interface instead for controlling the print queue.