I'm trying to use a file "testar.sh" to test GHDL and GTKWave installation on Debian, that's the command I should use: chmod +x testar.sh; ./testar.sh
, then this is what its shown
Could not initialize GTK! Is DISPLAY env var/xhost set?
Usage: gtkwave [OPTION]... [DUMPFILE] [SAVEFILE] [RCFILE]
and a list of commands