Best way to use multiple SSH private keys on one client
I want to use multiple private keys to connect to different servers or different portions of the same server (my uses are system administration of server, administration of Git, and normal Git usage within the same server). I tried simply stacking the keys in the id_rsa files to no avail.
Apparently a straightforward way to do this is to use the command
ssh -i <key location> login@server.example.com
That is quite cumbersome.
Any suggestions as to how to go about doing this a bit easier?
From my .ssh/config :
Host myshortname realname.example.com
HostName realname.example.com
IdentityFile ~/.ssh/realname_rsa # private key for realname
User remoteusername
Host myother realname2.example.org
HostName realname2.example.org
IdentityFile ~/.ssh/realname2_rsa
User remoteusername
And so on.
The answer from Randal Schwartz almost helped me all the way. I have a different username on the server, so I had to add the User keyword to my file:
Host friendly-name
HostName long.and.cumbersome.server.name
IdentityFile ~/.ssh/private_ssh_file
User username-on-remote-machine
Now you can connect using the friendly-name:
ssh friendly-name
More keywords can be found on the OpenSSH man page. NOTE: Some of the keywords listed might already be present in your /etc/ssh/ssh_config file.
You can instruct ssh to try multiple keys in succession when connecting. Here's how:
$ cat ~/.ssh/config
IdentityFile ~/.ssh/id_rsa
IdentityFile ~/.ssh/id_rsa_old
IdentityFile ~/.ssh/id_ed25519
# ... and so on
$ ssh server.example.com -v
....
debug1: Next authentication method: publickey
debug1: Trying private key: /home/example/.ssh/id_rsa
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey
debug1: Trying private key: /home/example/.ssh/id_rsa_old
debug1: read PEM private key done: type RSA
....
[server ~]$
This way you don't have to specify what key works with which server. It'll just use the first working key.
Also you would only enter a passphrase if a given server is willing to accept the key. As seen above ssh didn't try to ask for a password for .ssh/id_rsa even if it had one.
Surely it doesn't outbeat a per-server configuration as in other answers, but at least you won't have to add a configuration for all and every server you connect to!
链接地址: http://www.djcxy.com/p/25316.html上一篇: 在SSH上使用git不会选择私钥