Users Guide

• CMC accepts RSA keys up to key strength 4096, but the recommended key strength is 1024.
3. Click Generate, and move the mouse in the window as directed.
After the key is created, you can modify the key comment field.
You can also enter a passphrase to make the key secure. Ensure that you save the private key.
4. You have two options for using the public key:
• Save the public key to a file to upload later.
• Copy and paste the text from the Public key for pasting window when adding the account using the text option.
Generating Public Keys for Systems Running Linux
The ssh-keygen application for Linux clients is a command line tool with no graphical user interface. Open a terminal window and at the
shell prompt type:
ssh-keygen –t rsa –b 2048 –C testing
where,
–t must be rsa.
–b specifies the bit encryption size between 2048 and 4096.
–c allows modifying the public key comment and is optional.
The <passphrase> is optional. After the command completes, use the public file to pass to the RACADM for uploading the file.
RACADM Syntax Notes for CMC
When using the racadm sshpkauth command, ensure the following:
• For the –i option, the parameter must be svcacct. All other parameters for -i fail in CMC. The svcacct is a special account for
public key authentication over SSH in CMC.
• To log in to the CMC, the user must be service. Users of the other categories do have access to the public keys entered using the
sshpkauth command.
Viewing Public Keys
To view the public keys that you have added to the CMC, type:
racadm sshpkauth –i svcacct –k all –v
To view one key at a time, replace all with a number from 1 – 6. For example, to view key 2, type:
racadm sshpkauth –i svcacct –k 2 –v
Adding Public Keys
To add a public key to the CMC using the file upload -f option, type:
racadm sshpkauth –i svcacct –k 1 –p 0xfff –f <public key file>
NOTE:
You can only use the file upload option with remote RACADM. For more information, see Chassis Management
Controller for Dell PowerEdge M1000e RACADM Command Line Reference Guide .
To add a public key using the text upload option, type:
racadm sshpkauth –i svcacct –k 1 –p 0xfff –t “<public key text>”
Deleting Public Keys
To delete a public key type:
racadm sshpkauth –i svcacct –k 1 –d
Configuring CMC to Use Command Line Consoles
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