Generating ssh key
An ssh key holds information that once combined with a login action lets you login without using a password*. This is very useful if you login regularly.
* You have to leave the keyphrase empty while generating the key file in order to login without anything more than a username.
Basically you log in to the account you want the key file for, run a command and view the contents of the result:
$ ssh [email protected]chine [email protected]'s password: [email protected]:~$ ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/var/services/homes/username/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /var/services/homes/username/.ssh/id_rsa. Your public key has been saved in /var/services/homes/username/.ssh/id_rsa.pub. The key fingerprint is: SHA256:JvAD3zkQWHN/oqgqJyoK+XvvscuSAeA/voQECg1VcIM [email protected] The key's randomart image is: +---[RSA 2048]----+ |..o++o+ . | |.oE... + . | |+.. o . o . | |+.. = + o o | |.... * S | |...o.. + . | |o...oo. | |=.oo+. o | |*+++.+*. | +----[SHA256]-----+ [email protected]:~$ cat ~/.ssh/id_rsa.pub ssh-rsa AAAAB3NzaC1yc2E00000000000000000000nHNTHwm7rK4sZbqDZOEbQ8fw0GgQzBGQj6e 9IvHWAV4F1GZ5WZvZSojZcrV/wH1pKU60qa3D9wZRETMBJHee6ou/WxNzjjcZbwkmkNRzmIzBfyfFF tXjGo9u0ZRtW/H2NQTRKXTcgT7Blsd1eq7eokasJ2lIUa8mKTqfQm1oV0mHsn1FPxBUSugWn8JlHes 9AcZrYco2EhU5XUVJSDCEpN8tcfZqmWj/ZLKufgzUkBHxFIwru6fBX1NZYev1yzAtlvh5uCxljt9y1 a1SQYnA6ICRgf4yQdr8caESDqiI3Z8zJHBM2lm4xu2RJaTJTiAv2OfHALcAo0/if3NMrp [email protected] [email protected]:~$
With the cat command the keyfile is displayed, and you can use it for other things.