linux. Reinstall without disc

Question

linux

Now there is no disk or flash drive at hand. Is it possible to reinstall linux on "hot" from the system? (now on linux) Tell me where to google or how to do it easier.

Answer 1

1. You can, as one of the options - goo.gl/QYbbI
2. You can select sections with your hands, download the necessary files, register the boot from the new section in GRUB.
3. Not all distributions are supported: to register booting from an ISO image in GRUB, having previously free space (partition) on the HDD.
But it's easier to find installation media.

Answer 2

You can partition the disk, install the system manually - for example, gentoo stage 3, then chroot into the new system and configure the bootloader.

Answer 3

you can try using tftp

Answer 4

Any Linux is actually installed like this: the live system is loaded, the installer is launched in it. Those. there is always a kind of installation “from an already running Linux”.
All distributions do this automatically, except for some, for which the admin does it manually during installation. Among the latter, Gentoo should be noted, which has an intelligible handbook, and the installation process is described there step by step. In fact, this manual is suitable for any distribution, not just Gentoo.
So read the Gentoo Handbook and think about how to adapt it to your case. By the way, you can install it - it won’t be worse, but you will understand what and how happens during installation.

Answer 5

I would use kexec (well, or just throw it in /boot and boot with a full reboot) on the kernel-initrd, from which the installation will be performed (debian minimal cd only consists of them), which means that the whole system is only in RAM and with a disk it will be possible do any manipulation.