Dropbear, smallish SSH server and client:

Dropbear, smallish SSH server and client:
* https://matt.ucc.asn.au/dropbear/dropbear.html
* https://github.com/mkj/dropbear
* https://en.wikipedia.org/wiki/Dropbear_(software)
* Replacing OpenSSH with Dropbear: https://lowendbox.com/blog/replacing-openssh-with-dropbear