I already created an ssh key for myself sometime in the past. I don't remember "how many bits" it is. How can I tell?
I'm wondering because I'm using hosting at nearlyfreespeech.net and their faq says:
Can I configure my ssh connection to use a public key?
... we will not install keys that have a length less than 1536 bits ... We prefer that you use a key at least 2048 bits in length, and if you are generating a new key, the recommended length is 4096 bits.
[palvarez@oizon ~]$ ssh-keygen -l -f ~/.ssh/id_rsa.pub
2048 2e:8c:fd:aa:9f:95:86:9e:b0:d2:a6:1a:7e:d3:3e:74 .ssh/id_rsa.pub (RSA)
2048 bits.
Explanation:
-l Show the fingerprint of the key file.
-f filename Filename of the key file.
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