I have Stretch on my Raspberry runnig via VNC-Viewer and everything works fine. But there is no LXTerminal available. In the System Tools menu there is only Termit listed, in the Accessories I see Filemanager, Screenshot and Task Manager. How can I get LXTerminal? apt-get update changes nothing
I do not understand why you can't execute
lxterminal. On Raspbian Stretch, not using the Light version, it is installed by default.
Anyway, if you are missing it you can just install it with:
rpi ~$ sudo apt install lxterminal