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Quick shortcut if you know the hostname and want to save yourself one step for looking up the IP address separately.
There is 1 alternative - vote for the best!
Quick shortcut if you know the hostname and want to save yourself one step for looking up the IP address separately.
Works for multiple hosts (such as www.google.com) and/or wrong hosts.
If you can do better, submit your command here.
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nice! because I always delete the wrong line in the known_hosts file upon key errors, ever since the hostnames started being hashed by default. This is great, although I wonder if this will get each and every instance since the hosts' key may be listed under three different names: (1) the bare hostname, such as "bob", (2) the FQDN, such as "bob.example.com", or (3) the IP address. I'm guessing ssh-keygen just deletes entries corresponding to exactly what the input was.
@bwoodacre
Exactly. You need to run 'ssh-keygen -R' for every instance of the host in the known_hosts file.
It's nevertheless more comfortable than editing it by hand IMO :-)
Repeat after me: avoid backticks, they're evil ...