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#!/bin/bash |
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trap "exit" INT |
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echo -e "\nHost:" |
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ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 ubuntu@$1 \ |
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'uname -a && arch && uptime && sudo touch /home/ubuntu/.hushlogin /root/.hushlogin' |
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echo -e "\nAdding temporary SSH-key for Ubuntu root user..." |
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ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 ubuntu@$1 \ |
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'sudo cat /home/ubuntu/.ssh/authorized_keys | sudo tee /root/.ssh/authorized_keys' |
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echo -e "\nSystem trimming..." |
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ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 root@$1 -T <<'EOL' |
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export DEBIAN_FRONTEND=noninteractive |
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snap remove --purge oracle-cloud-agent && snap remove --purge core18 |
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apt-get purge -y linux-* lxc* lxd* vim* snapd* python* |
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apt-get update && apt-get install -y lsof |
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apt-get -y autoremove --purge |
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apt-get -y autoclean |
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rm -rf /var/log/* /var/lib/apt/* /var/cache/apt/* |
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df -h |
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EOL |
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echo "Check free space! for "/" mountpoint. <=700mb" |
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waittime=15 |
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while [ $waittime -gt 0 ]; do |
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echo -ne "$waittime\033[0K\r" |
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sleep 1 |
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: $((waittime--)) |
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done |
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echo -e "\nPreparing system..." |
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ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 root@$1 -T <<'EOL' |
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cd / |
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echo "Mounting tmpfs..." |
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mount -t tmpfs -o size=700m tmpfs mnt && tar --one-file-system -c . | tar -C /mnt -x |
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mount --make-private -o remount,rw / |
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mount --move dev mnt/dev && mount --move proc mnt/proc |
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mount --move run mnt/run && mount --move sys mnt/sys |
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sed -i "/^[^#]/d;" mnt/etc/fstab |
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echo "tmpfs / tmpfs defaults 0 0" >> mnt/etc/fstab |
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cd mnt && mkdir old_root |
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mount --make-private / |
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sleep 2 |
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echo "Changing the root mount..." |
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unshare -m |
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pivot_root . old_root |
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sleep 5 |
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echo "Starting SSH on 1022..." |
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iptables -I INPUT -p tcp -m state --state NEW -m tcp --dport 1022 -j ACCEPT |
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nohup /usr/sbin/sshd -D -p 1022 > /dev/null 2>&1 & |
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EOL |
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echo -e "\nFlashing the Debian image..." |
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ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 1022 root@$1 -T <<'EOL' |
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echo "Arch is $(arch)..." |
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IMAGEMIRROR="https://cloud.debian.org/images/cloud/bookworm" |
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IMAGEVERSION="debian-12-genericcloud" |
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IMAGEBUILD="20240701-1795" |
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for i in agetty dbus-daemon atd iscsid rpcbind unattended-upgrades; do pkill $i; done; kill 1; umount -l /dev/sda1 |
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if [ $(arch) = "x86_64" ] |
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then curl -L $IMAGEMIRROR/$IMAGEBUILD/$IMAGEVERSION-amd64-$IMAGEBUILD.tar.xz | tar -OJxvf - disk.raw | dd of=/dev/sda bs=1M; |
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elif [ $(arch) = "aarch64" ] |
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then curl -L $IMAGEMIRROR/$IMAGEBUILD/$IMAGEVERSION-arm64-$IMAGEBUILD.tar.xz | tar -OJxvf - disk.raw | dd of=/dev/sda bs=1M; |
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else |
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echo Unsported architecture! |
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fi |
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sleep 5 |
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echo "Syncing changes to the block storage..." |
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sync |
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sleep 5 |
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echo "Rebooting into Debian!" |
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nohup sh -c 'echo "1" > /proc/sys/kernel/sysrq && sleep 5 && echo "b" > /proc/sysrq-trigger' > /dev/null 2>&1 & |
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EOL |
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echo -e "\nWaiting until Debian starts... (3 min)" |
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waittime=180 |
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while [ $waittime -gt 0 ]; do |
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echo -ne "$waittime\033[0K\r" |
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sleep 1 |
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: $((waittime--)) |
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done |
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echo -e "\nAdding temporary SSH-key for Debian root user..." |
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ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 debian@$1 \ |
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'sudo cat /home/debian/.ssh/authorized_keys | sudo tee /root/.ssh/authorized_keys' |
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echo -e "\nDebian inititialisation..." |
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ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -p 22 root@$1 -T <<'EOL' |
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export DEBIAN_FRONTEND=noninteractive |
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echo "deb http://deb.debian.org/debian/ bookworm main contrib non-free non-free-firmware |
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deb http://deb.debian.org/debian/ bookworm-updates main contrib non-free non-free-firmware |
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deb http://deb.debian.org/debian/ bookworm-backports main contrib non-free non-free-firmware |
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deb http://security.debian.org/debian-security/ bookworm-security main contrib non-free non-free-firmware" > /etc/apt/sources.list |
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apt-get update && apt-get install -y locales-all |
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rm -rf /root/.ssh/ |
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sync |
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reboot |
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EOL |
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sleep 10 |
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echo -e "\nDone!" |
Where do I put the ssh key address while doing
/oci_ubuntu_to_debian.multiarch.sh my_vps_ip_address?This doesn't work:
/oci_ubuntu_to_debian.multiarch.sh my_vps_ip_address -i ~/some_folder/my_public_ssh_key.pubedit: I was accidentally using pub key, also I added
-i ~/some_folder/my_public_ssh_keymanually into the file wherever we login