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DIY install debian on Oracle Cloud Infrastructure ( Free Tier ) - ARM64
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| # start from a ubuntu minimal install | |
| # we need to shrink down the used space to move it in a tmpfs of 700MB | |
| apt install lsof partprobe | |
| snap remove oracle-cloud-agent | |
| snap remove core18 | |
| snap remove snapd | |
| apt purge snapd | |
| rm -rf ~/snap | |
| rm -rf /snap | |
| rm -rf /var/cache/snapd | |
| ## check what other package takes lot of space | |
| dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -n | |
| # remove big un | |
| apt remove linux-modules-extra-5.4.0-1037-oracle | |
| apt remove linux-oracle-headers-5.4.0-1037 linux-headers-5.4.0-1037-oracle | |
| apt autoremove | |
| apt autoclean | |
| apt clean | |
| # ok, the disk usage of / should be less than 600MB now | |
| cd / | |
| mount -t tmpfs -o size=700m tmpfs mnt | |
| tar --one-file-system -c . | tar -C /mnt -x | |
| mount --make-private -o remount,rw / | |
| mount --move dev mnt/dev | |
| mount --move proc mnt/proc | |
| mount --move run mnt/run | |
| mount --move sys mnt/sys | |
| sed -i '/^[^#]/d;' mnt/etc/fstab | |
| echo 'tmpfs / tmpfs defaults 0 0' >> mnt/etc/fstab | |
| cd mnt | |
| mkdir old_root | |
| pivot_root . old_root | |
| # now the root storage is the RAM | |
| # lets restart all runnig process | |
| service sshd restart | |
| # now switch to a new ssh connexion to let the old sshd terminate | |
| service systemd-udevd restart | |
| service systemd-journald restart | |
| service systemd-networkd restart | |
| service systemd-timesyncd restart | |
| service systemd-resolved restart | |
| service systemd-logind restart | |
| service networkd-dispatcher restart | |
| pkill agetty | |
| pkill dbus-daemon | |
| pkill atd | |
| pkill iscsid | |
| pkill rpcbind | |
| pkill unattended-upgrades | |
| kill 1 | |
| umount -l /dev/sda1 | |
| curl https://cdimage.debian.org/cdimage/openstack/current/debian-10-openstack-amd64.raw | dd of=/dev/sda bs=1M | |
| sync | |
| reboot | |
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