Also change the SSH host keys as they are preconfigured (the same) on all downloads on some ARM devices and it goes without saying change the root passphrase.
Discussion
#[1]
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#[1]
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```
cd /etc/ssh/
mkdir insecure_old
cp ssh_host* insecure_old
rm /etc/ssh/ssh_host_*
dpkg-reconfigure openssh-server
service ssh restart
```
Change directory `cd` and make directory `mkdir` then copy these files `cp` using the wildcard for all `*` and remove `rm` then generate new ssh keys `dpkg` and `restart` the service with the old ssh keys in folder `insecure_old`.
Thank you!