Drivers for Linux

You devices may be supported by extra kernel modules.
You can try to install kernel-modules-extra before searching a driver for your devices.

To install kernel-modules-extra
    yum install kernel-modules-extra

Reboot to take effect
    reboot

Compile A Kernel Module / Driver

To Install Kernel Header
yum install kernel-devel

To Install GCC
yum install gcc

<compile module source code>
make

<install your compiled module>
make install

To Generate module.dep for New Module
depmod

To Add New Module
modprobe module_name

PS: You may need to update initrd by mkinitrd for some boot devices.

Create Custom Linux Initrd

Extract from Initrd
gunzip < initrd.img | cpio -i --make-directories

Create Initrd
find ./ | cpio -H newc -o > initrd.cpio
gzip initrd.cpio
mv initrd.cpio.gz initrd.img



Create Initrd from System Folder
mkinitrd /boot/initrd.$(uname -r).img $(uname -r) 

grub2 Recovery

Set target Linux partition as root
    root=(hd0,6)

(You may list content of the root)
    ls /

Specify kernel file and Linux root
    linux /boot/vmlinuz root=/dev/sda6

Specify initial RAM disk
    initrd /boot/initrd

Boot
    boot