1.open a shell and run PS,I get nothing (two entries)but there is a GUI utility called sys monitor that seems to replace it

ps by default only shows processes running from the current user/current terminal

ps -ef
or
ps aux
will do what you want i think.

2.I set up a root and user account; to use KDE KPPP from the user account I am prompted for a root passwrd.Does this compromise security?

Probably not.  ppp needs root access to be able to access the modem.

When I start Kppp from user it doesn't dock to the task bar and infact
locks all action there--the desktop icons are still active,so I have found I can go to this sys monitor and kill the running Kppp,it says it is killing it(and I get a message from Kppp saying can't start) but then I exit to normal operation,where the modem icon of Kppp has docked to the taskbar,all icons are now again active. Strange,anyone?

No clue.

--Ray

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