Another question about this shell magic...

[Brian Candler]

On 01/10/2020 13:06, Martin Drescher wrote:
> what confuses me a bit is this shell(?) magic: When I type 'ssh ' on my console an hit the TAB twice, I get a list of host I would probably ssh to. This list does not come from an element in my bash history. On my initial question, I guessed this would somehow come from the known_hosts file. Does it?
> Can someone tell how this magic works?

Under Ubuntu 18.04, it appears to be giving me everything in /etc/hosts 
*and* everything in ~/.ssh/known_hosts

For the magic see:

/usr/share/bash-completion/completions/ssh

/usr/share/bash-completion/bash_completion   # function _known_hosts_real()