Get the source from here and extract them to /usr/src : Run make module to build the agrmodem.ko dan agrserial.ko : [root@localhost agrsm-2.1.80-4klixs2010]# make module make -C /lib/modules/`uname -r`/build/ SUBDIRS=/usr/src/agrsm-2.1.80-4klixs2010 modules make[1]: Entering direct [...]