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after changed ssh keys in both (client and server), a script that runs on the ssh client first give to the server two wrong public keys (probably the olds) then the right one.

gen 10 23:34:31 server sshd[25230]: Connection from client port 54948 on server port 53799 rdomain ""
gen 10 23:34:31 server sshd[25231]: Connection from client port 54958 on server port 53799 rdomain ""
gen 10 23:34:31 server sshd[25231]: Failed publickey for user1 from client port 54958 ssh2: ED25519 SHA256:wrong_key1
gen 10 23:34:31 server sshd[25230]: Failed publickey for user1 from client port 54948 ssh2: ED25519 SHA256:wrong_key1
gen 10 23:34:31 server sshd[25230]: Failed publickey for user1 from client port 54948 ssh2: ED25519 SHA256:wrong_key2
gen 10 23:34:31 server sshd[25231]: Failed publickey for user1 from client port 54958 ssh2: ED25519 SHA256:wrong_key2
gen 10 23:34:31 server sshd[25231]: Accepted key ED25519 SHA256:right_key found at /home/user1/.ssh/authorized_keys:1
gen 10 23:34:31 server sshd[25230]: Accepted key ED25519 SHA256:right_key found at /home/user1/.ssh/authorized_keys:1
gen 10 23:34:31 server sshd[25231]: Postponed publickey for user1 from client port 54958 ssh2 [preauth]
gen 10 23:34:31 server sshd[25230]: Postponed publickey for user1 from client port 54948 ssh2 [preauth]
gen 10 23:34:31 server sshd[25230]: Accepted key ED25519 SHA256:right_key found at /home/user1/.ssh/authorized_keys:1
gen 10 23:34:31 server sshd[25231]: Accepted key ED25519 SHA256:right_key found at /home/user1/.ssh/authorized_keys:1
gen 10 23:34:31 server sshd[25231]: Accepted publickey for user1 from client port 54958 ssh2: ED25519 SHA256:right_key
gen 10 23:34:31 server sshd[25230]: Accepted publickey for user1 from client port 54948 ssh2: ED25519 SHA256:right_key
gen 10 23:34:31 server sshd[25230]: pam_unix(sshd:session): session opened for user user1(uid=1000) by user1(uid=0)
gen 10 23:34:31 server sshd[25231]: pam_unix(sshd:session): session opened for user user1(uid=1000) by user1(uid=0)

I deleted the old keys from /home/user1/.ssh/ but cannot find where ssh store those two wrong public keys it sends at the beginning to the server

Any clue ?

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My error, changing the keys I created the ~/.ssh/config file for the various ssh servers, but I hadn't update the script so it sent to every ssh server all the keys in ~/.ssh/ until it found the right one

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  • As it’s currently written, your answer is unclear. Please edit to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers in the help center. Commented Jan 11 at 0:52

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