chromebook-linux-stretch-to-buster.sh

#!/bin/bash
#upgrade chromeos debian stretch to buster (for python 3.7)
#https://www.reddit.com/r/Crostini/comments/9rhauo/upgrade_from_stretch_to_buster_compilation_of/

#Fresh Stretch install. Let's make sure everything is up to date.
sudo apt-get update
sudo apt-get -y --allow-downgrades upgrade
sudo apt-get -y dist-upgrade

#Update package repository to Buster
sudo sed -i 's/stretch/buster/g' /etc/apt/sources.list

#Now let's do the update/upgrade dance again.
sudo apt-get update
sudo apt-get -y --allow-downgrades upgrade
sudo apt-get -y dist-upgrade

#Check your Debian version
cat /etc/issue

#Install Nano or use the text editor of your choosing
sudo apt-get -y install nano

#Edit /usr/lib/systemd/system/cros-sftp.service
sudo echo "#insert these two lines under the [service] heading, but before the [install] heading." >> /usr/lib/systemd/system/cros-sftp.service
sudo echo "RuntimeDirectory=sshd" >> /usr/lib/systemd/system/cros-sftp.service
sudo echo "RuntimeDirectoryMode=0755" >> /usr/lib/systemd/system/cros-sftp.service
sudo nano /usr/lib/systemd/system/cros-sftp.service

#Restart cros-sftp service
sudo systemctl daemon-reload
sudo systemctl restart cros-sftp

sudo apt-get update
sudo apt-get -y --allow-downgrades upgrade