Question: how to uninstall software in linux. I am facing issues installing No machine setup(NX)

Answer: 
`rpm -e <package>` or `yum remove <package>` if it was installed via a package. Otherwise `make uninstall` or judicious use of `rm`.
`yum remove <package>` As for any details on which packages are installed, you could use `yum list`. That should show all packages.