I have XBoard 4.4.2 under Ubuntu, but I have not run it yet. In the windows environment my command line is something like:
winboard -ics -icshost 80.100.28.169 -icshelper timeseal -zp -fcp crafty-23.2-win64.exe -fd 'C:\WinBoard\Crafty 23.2 PS' -autoKibitz -smpCores 4 -keepAlive 5
Under Xboard (with a Linux executable of an engine) is the command line similar ? Would someone like to give theirs as an example for me to follow?