echoall cc -c c.c as -o m70.o m70.s as -o l70.o l70.s ld -x -r -d l70.o m70.o c.o ../lib1 ../lib2 nm -ug ./sysfix a.out unix2 rm -f *.o a.out cp unix2 unix1 db unix1 _swapdev 1! % chmod 0 unix? ; chown bin unix?