The following document is for handling printer issue in linux/unix. (How to Cancel Print Requests from Oracle)

http://dbissues.blogspot.com/2016/10/how-to-cancel-all-prints-from-all.html

1:) The following command will delete single request .
cancel queuename

2:) The following command will provide u the list of all and current and old process.
lpstat

3:) The following command will provide You the list of printer with name.
lpstat (printername)

4:) You can cancel only jobs owned by you, or by an specified user (provided that you have the rights to do it).
cancel -u user

5:) The following command will cancel all job related to any printer .
cancel -a