The command cupsdisable -c -r hello HPLaserjet4 will pause the CUPS printer HPLaserjet4 and cancel all print jobs with a message, “hello”. The cupsdisable command is used to stop printers and classes, while the cupsenable command is used to start them. The -c option cancels all jobs on the named destination, and the -r option sets the message associated with the stopped state. The message will be displayed to the users who try to print to the paused printer. For example, the output of lpstat -p HPLaserjet4 after running the command will show:

printer HPLaserjet4 disabled since Wed 23 Jun 2023 11:54:03 AM UTC -

hello

The other options are not correct. The cupsreject command is used to reject or accept jobs for a printer or class, not to pause or resume them. The -p and -m options are not valid for either cupsdisable or cupsreject. The correct syntax for cupsreject is:

cupsreject [ -E ] [ -U username ] [ -h server [:port] ] [ -r reason ] destination (s)

The -E option forces encryption of the connection to the server, the -U option uses the specified username when connecting to the server, the -h option uses the specified server and port, and the -r option sets the message associated with the rejecting state123. References: 1: cupsdisable(8) - Linux manual page 2: cupsreject(8) - Linux manual page 3: CUPS Administration - Page: 1.4 - Seite 3 » Raspberry Pi Geek