Delete crypto key pubkey-chain ssh user-key

Hello,

You can check these;

 

crypto key zeroize pubkey-chain
Use the crypto key zeroize pubkey-chain command in Global Configuration
mode to erase all SSH server public key chains or the public key chain for a
user.
Syntax
crypto key zeroize pubkey-chain ssh [user-key username]

 

crypto key zeroize {rsa|dsa}
Use the crypto key zeroize {rsa|dsa} command in Global Configuration
mode to delete the RSA or DSA public and private keys from the switch.
Syntax
crypto key zeroize {rsa|dsa}

 

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Hope this will help!