Easily remove a line from ~/.ssh/known_hosts on a MAC

gistfile1.txt

http://blog.grizmio.cl/post/157828022813/easy-fast-bash-removeline
On a MAC sed needs -i '' on a Linux box it won´'t.

This is the most annoying message you could read in a ssh hurry:

baz:foo grizmio$ ssh root@192.168.1.2
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:+ZAA333A4Ar488888888AAAAAnzi08nv8NvAAAddAAAbbbAAAAA.
Please contact your system administrator.
Add correct host key in /home/grizmio/.ssh/known_hosts to get rid of this message.
Offending RSA key in /home/grizmio/.ssh/known_hosts:8
ECDSA host key for 192.168.1.2 has changed and you have requested strict checking.
Host key verification failed.

Add to ~/.bashrc file:

removesshline() { 
    sed -i '' "$1d" ~/.ssh/known_hosts
}

baz:foo grizmio$ . ~/.bashrc
baz:foo grizmio$ removesshline 8
baz:foo grizmio$ ssh root@192.168.1.2