從 kernel source code 查出 版本號碼
kernel/Makefile
1 VERSION = 4
2 PATCHLEVEL = 4
3 SUBLEVEL = 21
4 EXTRAVERSION =
5 NAME = Blurry Fish Butt
kernel/Makefile
1 VERSION = 4
2 PATCHLEVEL = 4
3 SUBLEVEL = 21
4 EXTRAVERSION =
5 NAME = Blurry Fish Butt