How to recover deleted .ssh/known_host entry?
I created a droplet (basically a server) to host a website on DigitalOcean. I connected to it using openssh on my computer, and it was working fine. Then I decided to delete the 3rd out of 3 entries inside of the ~/.ssh/known_hosts file (I'm, not sure why I did this).
Now when I try to connect to the droplet using ssh username@ipaddress it returns an error: username@ipaddress Permission denied (publickey). Is there a way to obtain the history of the known_hosts file? Maybe I need to copy-paste my public key somewhere?
Conclusion: delete server and start all over
server 18.04 permissions ssh openssh
asked Dec 16 at 14:16
JTizzle
12
add a comment |
I created a droplet (basically a server) to host a website on DigitalOcean. I connected to it using openssh on my computer, and it was working fine. Then I decided to delete the 3rd out of 3 entries inside of the ~/.ssh/known_hosts file (I'm, not sure why I did this).
Now when I try to connect to the droplet using ssh username@ipaddress it returns an error: username@ipaddress Permission denied (publickey). Is there a way to obtain the history of the known_hosts file? Maybe I need to copy-paste my public key somewhere?
Conclusion: delete server and start all over
server 18.04 permissions ssh openssh
asked Dec 16 at 14:16
JTizzle
12
add a comment |
I created a droplet (basically a server) to host a website on DigitalOcean. I connected to it using openssh on my computer, and it was working fine. Then I decided to delete the 3rd out of 3 entries inside of the ~/.ssh/known_hosts file (I'm, not sure why I did this).
Now when I try to connect to the droplet using ssh username@ipaddress it returns an error: username@ipaddress Permission denied (publickey). Is there a way to obtain the history of the known_hosts file? Maybe I need to copy-paste my public key somewhere?
Conclusion: delete server and start all over
server 18.04 permissions ssh openssh
asked Dec 16 at 14:16
JTizzle
12
I created a droplet (basically a server) to host a website on DigitalOcean. I connected to it using openssh on my computer, and it was working fine. Then I decided to delete the 3rd out of 3 entries inside of the ~/.ssh/known_hosts file (I'm, not sure why I did this).
Now when I try to connect to the droplet using ssh username@ipaddress it returns an error: username@ipaddress Permission denied (publickey). Is there a way to obtain the history of the known_hosts file? Maybe I need to copy-paste my public key somewhere?
Conclusion: delete server and start all over
server 18.04 permissions ssh openssh
server 18.04 permissions ssh openssh
asked Dec 16 at 14:16
JTizzle
12
asked Dec 16 at 14:16
JTizzle
12
edited Dec 16 at 15:06
asked Dec 16 at 14:16
JTizzle
12
asked Dec 16 at 14:16
JTizzle
12
asked Dec 16 at 14:16
JTizzle
12
12
add a comment |
add a comment |
1 Answer
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Now when I try to connect to the droplet using ssh username@ipaddress it returns an error: username@ipaddress Permission denied (publickey). Is there a way to obtain the history of the known_hosts file? Maybe I need to copy-paste my public key somewhere?
known_hosts keep a history of the public server keys your client has seen. It is used to protect against a man in the middle-attack, as that would lead to a changed remote public key.
It is thus used to authenticate the server to the client, not the opposite way. If you connect to an unknown host, you will be prompted if you want to trust the key or not.
You deleting lines in known_hosts is not the reason why you get permission denied when you try to connect using a keypair. Run ssh -vvv user@host to get more information about why you get connection denied.
answered Dec 16 at 14:20
vidarlo
8,99342442
You might be correct, but I assumed since it happened after the case that it was the problem. It attempts 'trying private key' 3 times but fails because of 'No such file or directory'. From what I know about keys, it should try id_rsa against the id_rsa.public on the server, but it doesn't. Any ideas?
– JTizzle
Dec 16 at 14:36
The key should be added to~/.ssh/authorized_keyson the server.
– vidarlo
Dec 16 at 14:38
The key is in there, yes. But the ssh -vvv makes it look like the private key version of the authorized key in the server wasn't used in 'Trying private key'.
– JTizzle
Dec 16 at 14:42
add a comment |
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1 Answer
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1 Answer
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Now when I try to connect to the droplet using ssh username@ipaddress it returns an error: username@ipaddress Permission denied (publickey). Is there a way to obtain the history of the known_hosts file? Maybe I need to copy-paste my public key somewhere?
known_hosts keep a history of the public server keys your client has seen. It is used to protect against a man in the middle-attack, as that would lead to a changed remote public key.
It is thus used to authenticate the server to the client, not the opposite way. If you connect to an unknown host, you will be prompted if you want to trust the key or not.
You deleting lines in known_hosts is not the reason why you get permission denied when you try to connect using a keypair. Run ssh -vvv user@host to get more information about why you get connection denied.
answered Dec 16 at 14:20
vidarlo
8,99342442
You might be correct, but I assumed since it happened after the case that it was the problem. It attempts 'trying private key' 3 times but fails because of 'No such file or directory'. From what I know about keys, it should try id_rsa against the id_rsa.public on the server, but it doesn't. Any ideas?
– JTizzle
Dec 16 at 14:36
The key should be added to~/.ssh/authorized_keyson the server.
– vidarlo
Dec 16 at 14:38
The key is in there, yes. But the ssh -vvv makes it look like the private key version of the authorized key in the server wasn't used in 'Trying private key'.
– JTizzle
Dec 16 at 14:42
add a comment |
Now when I try to connect to the droplet using ssh username@ipaddress it returns an error: username@ipaddress Permission denied (publickey). Is there a way to obtain the history of the known_hosts file? Maybe I need to copy-paste my public key somewhere?
known_hosts keep a history of the public server keys your client has seen. It is used to protect against a man in the middle-attack, as that would lead to a changed remote public key.
It is thus used to authenticate the server to the client, not the opposite way. If you connect to an unknown host, you will be prompted if you want to trust the key or not.
You deleting lines in known_hosts is not the reason why you get permission denied when you try to connect using a keypair. Run ssh -vvv user@host to get more information about why you get connection denied.
answered Dec 16 at 14:20
vidarlo
8,99342442
You might be correct, but I assumed since it happened after the case that it was the problem. It attempts 'trying private key' 3 times but fails because of 'No such file or directory'. From what I know about keys, it should try id_rsa against the id_rsa.public on the server, but it doesn't. Any ideas?
– JTizzle
Dec 16 at 14:36
The key should be added to~/.ssh/authorized_keyson the server.
– vidarlo
Dec 16 at 14:38
The key is in there, yes. But the ssh -vvv makes it look like the private key version of the authorized key in the server wasn't used in 'Trying private key'.
– JTizzle
Dec 16 at 14:42
add a comment |
Now when I try to connect to the droplet using ssh username@ipaddress it returns an error: username@ipaddress Permission denied (publickey). Is there a way to obtain the history of the known_hosts file? Maybe I need to copy-paste my public key somewhere?
known_hosts keep a history of the public server keys your client has seen. It is used to protect against a man in the middle-attack, as that would lead to a changed remote public key.
It is thus used to authenticate the server to the client, not the opposite way. If you connect to an unknown host, you will be prompted if you want to trust the key or not.
You deleting lines in known_hosts is not the reason why you get permission denied when you try to connect using a keypair. Run ssh -vvv user@host to get more information about why you get connection denied.
answered Dec 16 at 14:20
vidarlo
8,99342442
Now when I try to connect to the droplet using ssh username@ipaddress it returns an error: username@ipaddress Permission denied (publickey). Is there a way to obtain the history of the known_hosts file? Maybe I need to copy-paste my public key somewhere?
known_hosts keep a history of the public server keys your client has seen. It is used to protect against a man in the middle-attack, as that would lead to a changed remote public key.
It is thus used to authenticate the server to the client, not the opposite way. If you connect to an unknown host, you will be prompted if you want to trust the key or not.
You deleting lines in known_hosts is not the reason why you get permission denied when you try to connect using a keypair. Run ssh -vvv user@host to get more information about why you get connection denied.
answered Dec 16 at 14:20
vidarlo
8,99342442
answered Dec 16 at 14:20
vidarlo
8,99342442
answered Dec 16 at 14:20
vidarlo
8,99342442
answered Dec 16 at 14:20
vidarlo
8,99342442
8,99342442
You might be correct, but I assumed since it happened after the case that it was the problem. It attempts 'trying private key' 3 times but fails because of 'No such file or directory'. From what I know about keys, it should try id_rsa against the id_rsa.public on the server, but it doesn't. Any ideas?
– JTizzle
Dec 16 at 14:36
The key should be added to~/.ssh/authorized_keyson the server.
– vidarlo
Dec 16 at 14:38
The key is in there, yes. But the ssh -vvv makes it look like the private key version of the authorized key in the server wasn't used in 'Trying private key'.
– JTizzle
Dec 16 at 14:42
add a comment |
You might be correct, but I assumed since it happened after the case that it was the problem. It attempts 'trying private key' 3 times but fails because of 'No such file or directory'. From what I know about keys, it should try id_rsa against the id_rsa.public on the server, but it doesn't. Any ideas?
– JTizzle
Dec 16 at 14:36
The key should be added to~/.ssh/authorized_keyson the server.
– vidarlo
Dec 16 at 14:38
The key is in there, yes. But the ssh -vvv makes it look like the private key version of the authorized key in the server wasn't used in 'Trying private key'.
– JTizzle
Dec 16 at 14:42
You might be correct, but I assumed since it happened after the case that it was the problem. It attempts 'trying private key' 3 times but fails because of 'No such file or directory'. From what I know about keys, it should try id_rsa against the id_rsa.public on the server, but it doesn't. Any ideas?
– JTizzle
Dec 16 at 14:36
You might be correct, but I assumed since it happened after the case that it was the problem. It attempts 'trying private key' 3 times but fails because of 'No such file or directory'. From what I know about keys, it should try id_rsa against the id_rsa.public on the server, but it doesn't. Any ideas?
– JTizzle
Dec 16 at 14:36
The key should be added to
~/.ssh/authorized_keys on the server.– vidarlo
Dec 16 at 14:38
The key should be added to
~/.ssh/authorized_keys on the server.– vidarlo
Dec 16 at 14:38
The key is in there, yes. But the ssh -vvv makes it look like the private key version of the authorized key in the server wasn't used in 'Trying private key'.
– JTizzle
Dec 16 at 14:42
The key is in there, yes. But the ssh -vvv makes it look like the private key version of the authorized key in the server wasn't used in 'Trying private key'.
– JTizzle
Dec 16 at 14:42
add a comment |
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