리눅스 커널 모듈 추가/삭제

[root@jmlim ~]# insmod /lib/modules/2.6.25/kernel/fs/msdos/msdos.ko
insmod: error inserting '/lib/modules/2.6.25/kernel/fs/msdos/msdos.ko': -1 Unknown symbol in module
[root@jmlim ~]# insmod /lib/modules/2.6.25/kernel/fs/fat/fat.ko
[root@jmlim ~]# insmod /lib/modules/2.6.25/kernel/fs/msdos/msdos.ko
[root@jmlim ~]# rmmod fat
ERROR: Module fat is in use by msdos
[root@jmlim ~]# rmmod msdos
[root@jmlim ~]# rmmod fat
[root@jmlim ~]# insmod /lib/modules/2.6.25/kernel/fs/msdos/msdos.ko
insmod: error inserting '/lib/modules/2.6.25/kernel/fs/msdos/msdos.ko': -1 Unknown symbol in module
[root@jmlim ~]# modprobe msdos
[root@jmlim ~]#

멍청한 insmod와 똑똑한 modprobe.