find  -name "a.out" -exec rm -rf {} \;
 find  -name "*.ko" -exec rm -rf {} \;
 find  -name "*.o" -exec rm -rf {} \;
 find  -name "*.mod" -exec rm -rf {} \;
 find  -name "*.mod.c" -exec rm -rf {} \;
 find  -name "*.order" -exec rm -rf {} \;
 find  -name "*.symvers" -exec rm -rf {} \;
 find  -name "*.cache.mk" -exec rm -rf {} \;