The root directory generally doesn't contain any files, except perhaps on older systems where the standard boot image for the system, usually called /vmlinuz was kept there. (Most distributions have moved those files the the /boot directory). we are facing poblem like our rootfs file is working working on all ARM32 boards we have to make it global for all ARM32 boards. now as you guid me i will definetly improve in my self and finish this project on time under you guidance.Basically you want a cross debootstrap (like Debian )for CENTOS which can be stored in any of the sub folder of other OS and we need not have to install it and just access to the CENTOS repository . It can be use to create roofs for different architecture. Please correct me sir if I am wrong. Thanking you sir, Yours obediently SHUBHAM MATHUR Sent from my iPhone