Rack OS Files

Highlight:

Ubuntu14.04 primary XZ compressed OS can not delete /etc/fstab.
Please modify it to contents as below.

Original,
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/vda1 during installation
UUID=8c8184de-d0d2-4b44-9c11-e98acc64fd5d /                   ext4    errors=remount-ro   1       1 

Update to,

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/vda1 during installation
/dev/ram0 /                                                  ext4    errors=remount-ro    0       0  


Ubuntu server 14.04, file system howto:

1. Install a OS u want to use
2. Install necessory drivers
3. detach the OS hdd and attach it to another machine (VM).
4. Mount the OS disk to /media
5. tar -cf /home/SlesOS.tar /media/*
6. Split and XZ them to reduce system boot time


Ubuntu server initrd howto:
1. Prepare a bootable Cent7.x initrd and unzip it.
2. Install a minimal ubuntu
3. Install necessory drivers such as network / disk / usb etc. for booting
4. Install nfs modules so that your can freely use 'mount.nfs xxxx:/xxx /media'
5. Copy all lib/modules/3.13.0-101-generic with all subfolders to replace the same folders in Cent7.x initrd you got in Step1
6. repackage the initrd file.
7. Release it with orignal ubuntu kernels and your self-made initrd