Configuring run levels on single-user systems

Edit online

You can change run levels on single-user systems.

  1. Check the /etc/inittab file to confirm that the run level to which you are changing supports the processes that you are running.
    The getty process is particularly important, since it controls the terminal line access for the system console and other logins. Ensure that the getty process is enabled at all run levels. For more information about the inittab file, see inittab.
  2. Use the smit telinit fast path to access the Set System Run Level menu.
    For more information about the telinit command, see telinit.
  3. Type the new system run level in the System RUN LEVEL field.
  4. Press Enter to implement all of the settings in this procedure.
    The system responds by telling you which processes are terminating or starting as a result of the change in run level and by displaying the message:
    INIT: New run level: n
    where n is the new run-level number.