SFTP setup

sudo apt install -y ssh
sudo systemctl enable ssh
sudo systemctl start ssh
sudo addgroup sftp
sudo adduser walu
sudo usermod -a -G sftp walu
sudo mkdir -p /var/sftp/files
sudo chown root:root /var/sftp
sudo chmod 755 /var/sftp
sudo chown walu:walu /var/sftp/files

Match User walu
ChrootDirectory /var/sftp
X11Forwarding no
AllowTcpForwarding no
ForceCommand internal-sftp

sudo systemctl restart ssh