[Maria-discuss] command history - ignore cmds including keywords - ?

Hi guys. I'm sroogling and the Internet says there should be a couple of ways to tell mySQL, MariaDB too I'd hope, to ignore command lines which contain certain keywords. So I tried bash/shell variable and also put some things into '.my.cnf' but to no avail. Does anybody know how to achieve such a basic, I'd like to think, thing? many thanks, L.