Hello, You can check these;   crypto key zeroize pubkey-chainUse the crypto key zeroize pubkey-chain command in Global Configurationmode to erase all SSH server public key chains or the public key chain for auser.Syntaxcrypto key zeroize pubkey-chain ssh [user-key username]   crypto key zeroize {rsa|dsa}Use the crypto key zeroize {rsa|dsa} command in Global Configurationmode to delete the RSA or DSA public and private keys from the switch.Syntaxcrypto key zeroize {rsa|dsa}   Page 1090-1091 [URL]   Hope this will help!
Hi Dear, How to delete user crypto key pubkey-chain ssh user-key in dell switches N1148T   Regards, Ramu
Delete crypto key pubkey-chain ssh user-key