Hello, How can I distinguish the X related proccesses (X server or X clients) among the all processes in the system? For example, I think the follows are some candidate to distinguish the X related processes: 1) They use specific system calls to manupulate the display. 2) Specific network port number(or UNIX domain sockets) is used to communicate between X server and X clients. 3) They refer specific environmental variables such as DISPLAY. What do you think of this? Any ideas? -- Seongsu's blog - http://www.senux.com/ "I'd crawl over an acre of 'Visual This++' and 'Integrated Development That' to get to gcc, Emacs, and gdb. Thank you." (By Vance Petree, Virginia Power) -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/