mknod 创建设备:
mknod - make block or character special
mknod [OPTION] ...NAME TYPE [MAJOR主设备号 MINOR 次设备号]
[root@localhost /]# ls -l /dev
总计 0
crw-rw---- 1 root audio 14, 12 06-04 02:30 adsp
crw------- 1 root root 10, 175 06-04 02:30 agpgart
crw-rw---- 1 root audio 14, 4 06-04 02:30 audio
crw------- 1 root root 10, 62 06-04 02:30 autofs
drwxr-xr-x 3 root root 60 06-04 02:30 bus
crw------- 1 root root 5, 1 06-04 02:31 console
lrwxrwxrwx 1 root root 11 06-04 02:30 core -> /pr
[root@localhost /]# mknod /dev/testdev c设备类型字符型 111主设备号 1次设备号
[root@localhost /]# ls -l /dev/testdev
crw-r--r-- 1 root root 111, 1 06-04 03:55 /dev/testdev