November 2007
Beginner
642 pages
15h 43m
English
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7.14. Using Comments to Label Keys
Problem
You have a lot of SSH keys, and you would like a simple way to identify the public keys after they are transferred to your known_hosts and authorized_keys2 files.
Solution
Use the comment option when
you create a key to give it a descriptive label:
$ ssh-keygen -t rsa -C "mailserver on jarlsberg"The key looks like this:
ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAoK8bYXg195hp+y1oeMWdwlBKdGkSG8UqrwKpwNU9Sbo+uGPpNxU3iAjRa LYTniwnoS0j+Nwj+POU5s9KKBf5hx+EJT/ 8wl70KyoyslPghsQAUdODoEwCzNFdIME8nm0vxzlAxS+SO45RxdXB08j8WMdC92PcMOxIB1wPCIntji0= mailserver on jarlsberg
This is helpful when you have a lot of keys in known_hosts and authorized_keys2 because even though you can give the keys unique names, the keynames are not stored in these files.
Discussion
OpenSSH ignores the comment
field; it's a convenience for human users.
See Also
man 1 ssh-keygen
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