GTKWave is a free and open source electronic waveform viewer for viewing simulation results for Linux, Windows and MacOS. You can use this application to read and view FST, LXT, LXT2, VZT, GHW, standard Verilog VCD/EVCD files. It comes with Tcl scripting, callback capability, post-mortem and interactive viewing of VCD files and more. It is released under GNU General Public License version 2.0 (GPLv2).
Install GTKWave on Ubuntu Linux
GTKWave is available as a flatpak package file from flathub repository. So first you need to install the latest version of flatpak and flathub on your system and restart your system after the installation. Follow the below link for the installation instructions.
Now open the terminal app and run below command to install GTKWave. You can open the terminal app using ctrl+alt+t keys or via the show application menu.
flatpak install flathub io.github.gtkwave.GTKWave
After the installation start GTKWave using this command.
flatpak run io.github.gtkwave.GTKWave
You can also uninstall it using this command.
sudo flatpak uninstall io.github.gtkwave.GTKWave