Linux
id_rsa (private key)
What is it?
The id_rsa is a private key used in RSA cryptography systems. It serves for secure authentication in connections, such as in SSH, providing secure access to remote systems and ensuring communication integrity.
How to use via SSH:
The first step is to grant permissions to the file id_rsa:
Afterwards, we can use it, for example, in SSH with the following command:
And we would access the target machine without the need for a password.
Example of a id_rsa (private key) content:
Where is it?
If the user is named John, it's most likely that the id_rsa (private key) is located in the directory /home/john/.ssh/id_rsa.
In the case of root, it's most likely located in the directory /root/.ssh/id_rsa.
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