It is strange to reproduce, as kudzu is a shell script. And right this boot time it gave no error. Analyzing commands, it seems that the offending command is kudzu -z || kudzu Tipically tou have sometimes the illegal option error, sometimes not, and it happens with the second kudzu in the command So I tried a two times sequence with: [root@fedora ~]# kudzu -z ||gdb kudzu GNU gdb Red Hat Linux (6.3.0.0-1.94rh) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-redhat-linux-gnu"...Using host libthread_db library "/lib/libthread_db.so.1". (gdb) run Starting program: /sbin/kudzu Reading symbols from shared object read from target memory...done. Loaded system supplied DSO at 0x3b4000 Program exited normally. (gdb) quit [root@fedora ~]# kudzu -z ||gdb kudzu GNU gdb Red Hat Linux (6.3.0.0-1.94rh) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-redhat-linux-gnu"...Using host libthread_db library "/lib/libthread_db.so.1". (gdb) run Starting program: /sbin/kudzu Reading symbols from shared object read from target memory...done. Loaded system supplied DSO at 0x745000 Program received signal SIGILL, Illegal instruction. 0x0805ee2f in run_vm86 () at lrmi.c:733 733 asm volatile ( (gdb) (gdb) quit The program is running. Exit anyway? (y or n) y I don't know if other answers in last error could be more useful... HIH, Gianluca <div>2005/12/29, Gianluca Cecchi <<a href="mailto:gianluca.cecchi@gmail.com">gianluca.cecchi@gmail.com</a>>:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> hello, when kudzu starts it gives Checking for hardware changes/etc/rc.d/init.d/kudzu: line 23: 3937 Illegal instruction /sbin/kudzu $KUDZU_ARGS [FAILED] in "start" function there is /sbin/kudzu $KUDZU_ARGS -z || /sbin/kudzu $KUDZU_ARGS instead of typical /usr/sbin/kudzu $KUDZU_ARGS -t 30 if [ "$RETVAL" -eq 5 ]; then echo -n $"Hardware configuration timed out." echo -n $"Run '/usr/sbin/kudzu' from the command line to re-detect." initlog -n kudzu -s $"Hardware configuration timed out." initlog -n kudzu -s $"Run '/usr/sbin/kudzu' from the command line to re-detect." fi Any reason for that? Gianluca </blockquote></div>