grub.cfg for live boot of custom usb drive

grub.cfg

set menu_color_normal=white/black
set menu_color_highlight=black/light-gray


menuentry "Try openSUSE Tumbleweed GNOME Live ISO" {
    set gfxpayload=keep
    set iso_path=/openSUSE-Tumbleweed-GNOME-Live-x86_64-Snapshot20180220-Media.iso
    loopback loop0 ${iso_path}
    echo Loading kernel...
    linux (loop0)/boot/x86_64/loader/linux ${extra_cmdline} splash=silent quiet root=live:CDLABEL=openSUSE_Tumbleweed_GNOME_Live rd.live.image rd.live.overlay.persistent rd.live.overlay.cowfs=ext4 iso-scan/filename=${iso_path}
    echo Loading initrd...
    initrd (loop0)/boot/x86_64/loader/initrd
}

menuentry "Try Ubuntu 16.04 ISO" {
	set gfxpayload=keep
	set ubu_path=/ubuntu-16.04-desktop-amd64.iso
	search.file $ubu_path cd_dev
	loopback loop ($cd_dev)${ubu_path}
	set root=(loop)
	linux	/casper/vmlinuz.efi  file=/cdrom/preseed/ubuntu.seed boot=casper iso-scan/filename=${ubu_path} 
	initrd	/casper/initrd.lz
}

menuentry "Try Ubuntu 14.04 ISO" {
	set gfxpayload=keep
	set ubu_path=/ubuntu-14.04-desktop-amd64.iso
	search.file $ubu_path cd_dev
	loopback loop ($cd_dev)${ubu_path}
	set root=(loop)
	linux	/casper/vmlinuz.efi  file=/cdrom/preseed/ubuntu.seed boot=casper iso-scan/filename=${ubu_path} 
	initrd	/casper/initrd.lz
}

menuentry "Try Ubuntu 18.04 ISO" {
	set gfxpayload=keep
	set ubu_path=/ubuntu-18.04-desktop-amd64.iso
	search.file $ubu_path cd_dev
	loopback loop ($cd_dev)${ubu_path}
	set root=(loop)
	linux	/casper/vmlinuz  file=/cdrom/preseed/ubuntu.seed boot=casper iso-scan/filename=${ubu_path} 
	initrd	/casper/initrd.lz
}

menuentry "Try Debian 9.1 ISO" {
	set deb_path=/debian-live-9.0.1-amd64-gnome.iso
	search.file $deb_path cd_dev
	probe -u -s cd_uuid ${cd_dev}
	loopback loop ($cd_dev)${deb_path}
	set root=(loop)
	linux  /live/vmlinuz-4.9.0-3-amd64 boot=live components "findiso=${deb_path}"
	initrd /live/initrd.img-4.9.0-3-amd64
}

menuentry "Try Debian testing ISO" {
	set deb_path=/debian-live-testing-amd64-gnome.iso
	search.file $deb_path cd_dev
	probe -u -s cd_uuid ${cd_dev}
	loopback loop ($cd_dev)${deb_path}
	set root=(loop)
	linux  /live/vmlinuz-4.13.0-1-amd64 boot=live components "findiso=${deb_path}"
	initrd /live/initrd.img-4.13.0-1-amd64
}

menuentry 'Try Fedora-Workstation-Live 26 ISO' {
	set deb_path=/Fedora-Workstation-Live-x86_64-26-1.5.iso
	search.file $deb_path cd_dev
	probe -u -s cd_uuid ${cd_dev}
	loopback loop ($cd_dev)${deb_path}
	set root=(loop)
	linux /images/pxeboot/vmlinuz root=live:CDLABEL=Fedora-WS-Live-26-1-5 rd.live.image iso-scan/filename="${deb_path}"
	initrd /images/pxeboot/initrd.img
}