user@debian:~$ linuxcnc
LINUXCNC - 2.7.0
Machine configuration directory is '/home/user/linuxcnc/configs/sim.axis'
Machine configuration file is 'axis.ini'
Starting LinuxCNC...
Error: could not insert module /usr/realtime-3.4-9-rtai-686-pae/modules/rtai_hal.ko: File exists
Realtime system did not load
Shutting down and cleaning up LinuxCNC...
RTAPI: ERROR: could not open shared memory (errno=2)
/usr/bin/linuxcnc: line 542:  3753 Segmentation fault      $HALCMD stop
RTAPI: ERROR: could not open shared memory (errno=2)
/usr/bin/linuxcnc: line 542:  3754 Segmentation fault      $HALCMD unload all
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: ERROR: could not open shared memory (errno=2)
RTAPI: ERROR: could not open shared memory (errno=2)
Error: Module hal_lib is not currently loaded
Error: Module rtapi is not currently loaded
Error: Module rtai_math is not currently loaded
Error: Module rtai_sched is not currently loaded
Error: Module rtai_hal is in use
LinuxCNC terminated with an error.  You can find more information in the log:
    /home/user/linuxcnc_debug.txt
and
    /home/user/linuxcnc_print.txt
as well as in the output of the shell command 'dmesg' and in the terminal
user@debian:~$ ^C
user@debian:~$