I have installed Grass5 using binaries in a PC runing Linux. After defining a project area and after typing 'tcltkgrass&' I got following message:
GRASS:~> /usr/local/grass5/bin/tcltkgrass: line3: exec: wish: not foundWhy?
Do you have the tcl and tk libraries installed? They supply
"wish" which is the tcl interpreter which is required for
If already installed, it may be you don't have a /usr/bin/wish, but do have something like /usr/bin/wish8.3. If so, you can define the environment variable GRASS_WISH=wish8.3, and tcltkgrass should then work.
GRASS Development Team