Here’s a handy script for konsole users like myself:
knewtab — create a new tab in a konsole window, from the commandline
usage: knewtab {tabname} {command line …}
Creates a new tab in a “konsole” window (the current window, or a new one if the command is not run from a konsole).
Requires that the konsole app be run with the “–script” switch.