0、准备文件夹

mkdir /mnt/centos
mkdir /mnt/iso

1、挂载CD Live Linux (for example Centos7)

mount -o loop /mnt/shared/CentOS-7-x86_64-LiveGNOME-2003.iso /mnt/centos

2、将镜像中的文件copy出来

cp -rfp /mnt/centos/* /mnt/iso/.
ls /mnt/iso

EFI isolinux LiveOS

3、进入copy出来的文件夹的系统中

cd /mnt/iso/LiveOS
ls

osmin.img squanshfs.img

4、解压img

unsquashfs squashfd.img
ls

osmin.img squashfs.img squashfs-root

5、进入squashfs-root/LiveOS

cd squashfs-root/LiveOS
ls

ext3fs.img

6、挂载ext3fs.img

mkdir ext3fs
mount -o loop ext3fs.img ext3fs
ls

bin boot dev etc home lib lib64 lost+found media mnt opt proc root run sbin srv sys tmp usr var

制作自启动的定制化Linux ISO

原文：https://www.cnblogs.com/janescott/p/13058968.html