Hello everybody
May you advise how can I find which services are running already in my Solaris 8 workstation?
Thanks and Regards

Try netstat -a

Thanks
can it shows non running services also?

It will show you what services are listening. This means if telnet is allowed, there will be a entry such as...
*.telnet *.* 0 0 0 0 LISTEN

If no one is actually connected via telnet then that is all you would see ($ netstat -a|grep -i telnet). If someone is connected, then you would see that connection also.

by "non running" do you mean installed on your system? if so then that would depend on what is installed at your site.

Yes for example I have installed some sort of software which has problems during launching and I need to investigate it.
Regards

well check the error logs of that program you are trying to run. when you enter the path to the executable at the command line, what happens? any information output to your screen? look in the documentation of the software that youare using, and see where it logs its errors.