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Last login: Wed Jan 27 20:33:21 on console
liukun-MBP:~ kamil$ cd ~/.ssh/
liukun-MBP:.ssh kamil$ ls
id_rsa		id_rsa.pub	known_hosts
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ mkdir key_backup
liukun-MBP:.ssh kamil$ cp id_rsa* key_backup/
liukun-MBP:.ssh kamil$ rm id_rsa*
liukun-MBP:.ssh kamil$ ssh-keygen -t rsa -C "xzdzlbk@hotmail.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/kamil/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Saving key "/Users/kamil/.ssh/id_rsa" failed: passphrase is too short (minimum four characters)
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ ssh-keygen -t rsa -C "xzdzlbk@hotmail.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/kamil/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /Users/kamil/.ssh/id_rsa.
Your public key has been saved in /Users/kamil/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:A0/vICHX8/vYqWWhqHSl/UvcDSiZcA5sV9w3w0USpiY xzdzlbk@hotmail.com
The key's randomart image is:
+---[RSA 2048]----+
|           ...=o+|
|       o   ..o.=.|
|    . + O E o  .o|
|     o * X = .   |
|      . S O o .  |
|       . O = o o |
|      . + = = . .|
|     . o   O .   |
|      .   o.*.   |
+----[SHA256]-----+
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ ls
id_rsa		id_rsa.pub	key_backup	known_hosts
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ 
liukun-MBP:.ssh kamil$ cat id_rsa.pub 
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCvjbzNeFt+spObGrv0umePX0bKrZ2xYFokca3kvZ8bk41P6iUZFM+RYllpnkD7erRhkphhjnhiBY8Bmre4ms7QpIBmDVtEc0sGSntOS2LEEMPW8RQqGke/7WSH9lFVj63PUqGwO1y5zMHJPeRtVNyn00msJYdfrWyEfcCQWCJAGVn6vUsWIZvLX0lE43F9cYlYxK3XoBwkr7Pt30uwsBqLvnOsZqoisaU/7Hgx55WhqTrTXgpV/oqhNAsDsD0POU8vac51i1g5lPG0hi31VSVVHAUy6BnTT5zho8nWNIP2k0E7/JvChyTs7gyKKf7KPz0FloCCaJ4lVt0rebLlrV3X xzdzlbk@hotmail.com
liukun-MBP:.ssh kamil$