kernel update problem >> someone help please

[k_mohsen]

hi
i want to update my fc4 kernel to 2.6.25.4
i use this comand :


$ make mrproper
$ make config
$make clean
$make bzImage
$ make modules
$ su
password:
$ make modules_install
$ mkinitrd /boot/initrd-2.6.25.4.img 2.6.25.4
or
$mkramfs ......
or
$yarid .......

.
.
.
problem is here for "mkinitrd" , "nkramfs" , "yarid".
bash say me they are not comand

help please
thanks