Add your own kernel and ramfs based on the existing LinuxLiveCD

Add your own kernel and ramfs based on the existing LinuxLiveCD

Original LiveCD: install-amd64-minimal-20130711.iso (gentoo)

Working System: CentOS

1. Copy the content of the original LiveCD:

 

[root@localhost Downloads]# mkdir /mnt/livecd[root@localhost Downloads]# mkdir /mnt/img[root@localhost Downloads]# mount -t iso9660 -o loop install-amd64-minimal-20130711.iso /mnt/livecd/mount: /dev/loop0 is write-protected, mounting read-only<pre name="code" class="html">[root@localhost Downloads]# cp -r /mnt/livecd/* /mnt/img

 

2. Switch to/mnt/img to view the content under/mnt/img.

 

 

[root@localhost img]# lsgentoo.efimg             image.squashfs  livecd  README.txtgentoo.efimg.mountPoint  isolinux    

3. Put your kernel and ramfs into the isolinux folder. The kernel here is bzImage, and ramfsis ramfs.tar.gz

 

 

[root@localhost img]# ls isolinux/boot.cat  elilo.efi  F4.msg  F7.msg      isolinux.bin  memtest86boot.msg  F2.msg     F5.msg  gentoo      isolinux.cfg  ramfs.tar.gzbzImage   F3.msg     F6.msg  gentoo.igz  kernels.msg   System.map-gentoo

4. Modify isolinux. cfg and add a startup Item (the append item can be added or removed as needed ):

 

 

label hello-test  kernel bzImage  append root=/dev/ram init=/linuxrc initrd=ramfs.tar.gz

5. Go back to img and create your own iso file.

 

 

mkisofs -R -b isolinux/isolinux.bin -c isolinux/boot.cat -o /tmp/test.iso -V "test Linux" -no-emul-boot -boot-load-size 4 -boot-info-table .

6. directly use test. iso to use a virtual machine, or burn it. When you enter the startup interface, press the TAB key to view the hello-test item, enter it, and start: