Starting, Stopping, and Killing Processes
You or another user might have a process that (according to
has been sleeping for several
days, waiting for input.
If you can't
the process, even with kill -9
there may be a bug or some other problem.
These processes can be unkillable because they've made a request for a
hardware device or network resource.
UNIX has put them to sleep at a very high priority and the event
that they are waiting on hasn't happened (because of a network problem,
This causes all
other signals to be held until the hardware event occurs.
The signal sent by kill
doesn't do any good.
If the problem is with a terminal and you can get to the back of the terminal
or the back of the computer, try unplugging the line from the port.
Also, try typing
on the keyboard - if the user typed
while getting a lot of output, this may free the process.
Ask your vendor if there's a special command to reset the
device driver (42.1
If there isn't, you may have to reboot the computer.