Exercise: Booting from a LiveUSB ISO and contents on /dev/sda6

[Philip Rhoades]

People,

I want to enlarge my root partition on a Fedora 23 x86_64 system and I 
know I can boot on a LiveUSB stick and use [g]parted from there to do 
what I want but I thought I would try creating a small partition with 
the ISO and its contents in it to see if I could do what I want without 
needing to use the USB stick.

The contents of /dev/sda6 is:

dr-xr-xr-x   3 root root       4096 May 22 05:03 EFI
dr-xr-xr-x   2 root root       4096 May 22 05:05 LiveOS
dr-xr-xr-x   2 root root       4096 May 22 05:03 isolinux
drwx------   2 root root      16384 Nov  2 06:08 lost+found
-r--r--r--   1 root root       2460 May 22 05:04 Fedora-Legal-README.txt
-rw-r-----   1 qemu qemu 1007681536 Oct  7 20:14 
Fedora-Live-Xfce-x86_64-22-3.iso
-r--r--r--   1 root root       1063 May 22 05:04 LICENSE


I have made a little progress but I still can't get a boot - here is the 
current state of the relevant section of my grub2.cfg (I have been 
trying various changes):

menuentry "Fedora 22 XFCE ISO Boot (x86_64 bit)" {
    insmod part_gpt
    set isoname="Fedora-Live-Xfce-x86_64-22-3"
    echo $isoname
    set isofile="${isoname}.iso"
    echo $isofile
    loopback loop (hd0,gpt6)/$isofile
    echo $loop
    linux (loop)/isolinux/vmlinuz0 root=live:CDLABEL=${isoname} 
rootfstype=auto ro rd.live.image rd.luks=0 rd.md=0 rd.dm=0 
iso-scan/filename=${isofile}
    initrd (loop)/isolinux/initrd0.img
}

During the attempted boot I see the first two "echo"s but then get 
messages that "linux" and "initrd" commands do not exist . . is it 
something simple I am missing?

Thanks,

Phil.
--
Philip Rhoades

PO Box 896
Cowra  NSW  2794
Australia
E-mail:  address@hidden