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# SSH

## SSH als root mit fremden key

```
sudo ssh -i /home/user/.ssh/id_rsa" user@192.168.0.72
```

über Jumphost:

```
ssh -o ProxyCommand="ssh -W %h:%p -q ubuntu@jumphost-xxx.cloud" ubuntu@10.5.2.44
```

## Generate public key from private key

In case you only have the private key, you can generate the public key like this:

```
ssh-keygen -f ~/.ssh/id_rsa -y > ~/.ssh/id_rsa.pub
```