Working with ISOs
Let's say you've got a CD ISO, but you want to boot that from the network, because using virtual media over an iDRAC sucks.
And you wanna jam it into Foreman: https://projects.theforeman.org/projects/foreman/wiki/Fetch_boot_files_via_http_instead_of_TFTP
Looks like memdisk is involved in "chaining" the ISO along: https://wiki.syslinux.org/wiki/index.php?title=MEMDISK
New in 2020
Well I forgot I had this page, but I've been wanting it again because I tried to install Pop OS and had no luck with local USB.
It get somewhat more complex with UEFI, I think, but here are some notes. Pop OS has no published support for netinst, only USB and DVD installs. For some reason, illustrious simply will not read the squashfs from the USB without reporting errors, wtf O_o
How it can work: https://unix.stackexchange.com/questions/218379/boot-iso-file-through-uefi-by-calling-efi-executable-inside-the-iso
Live CD to netbootable: https://discourse.ubuntu.com/t/netbooting-the-live-server-installer/14510
Ubuntu hardware enablement notes: https://wiki.ubuntu.com/Kernel/LTSEnablementStack
Maybe can PXE this with a pxelinux.cfg/default entry:
# taken from grub.conf on the iso
menuentry "Try or Install Pop_OS" --class pop-os {
set gfxpayload=keep
linux /casper_pop-os_20.10_amd64_nvidia_debug_22/vmlinuz.efi boot=casper live-media-path=/casper_pop-os_20.10_amd64_nvidia_debug_22 hostname=pop-os username=pop-os noprompt modules_load=nvidia ---
initrd /casper_pop-os_20.10_amd64_nvidia_debug_22/initrd.gz
}How to run tftp server on suomi:
- /home/furinkan/Documents/tftp_root/uefi
- sudo py3tftp -p 69
- Unifi DHCP points to x.x.x.175 and looks for syslinux.efi
I found that Pop's initrd doesn't have support for a ramdisk, so copying Ubuntu's config didn't work with it. Here's some tricky stuff with initrds:
Mangling your initrd: https://wiki.ubuntu.com/CustomizeLiveInitrd
Modern initrds are whack: https://unix.stackexchange.com/questions/163346/why-is-it-that-my-initrd-only-has-one-directory-namely-kernel