Hi @janw.oostendorp, I’m pretty sure your command is fine but the command exits so fast you cannot see it. Run a command that sticks around, like top to see what I mean.
But mate-terminal has a profile setting and I recall, in the past, I made a separate profile just to include this because it’s not always desired. Edit -> Profile Preferences does change your default profile, something to keep in mind.
Under Title and Command is When command exits and can be set to Hold the terminal open.
There are other solutions but this should do the trick.