Ssh-keygen c flag

1. What does ssh-keygen R do?
2. What is ssh-keygen in Linux?
3. What format is ssh-keygen?
4. What is RSA in ssh-keygen?
5. Is Ed25519 better than RSA?
6. How do you get the 2048 RSA key in Linux?
7. What is passphrase in ssh-keygen?
8. When performing an ssh-keygen What is the default public key name in Linux?
9. What does id_rsa stand for?

What does ssh-keygen R do?

ssh-keygen generates, manages and converts authentication keys for ssh(1). ssh-keygen can create RSA keys for use by SSH protocol version 1 and RSA or DSA keys for use by SSH protocol version 2. ... If invoked without any arguments, ssh-keygen will generate an RSA key for use in SSH protocol 2 connections.

What is ssh-keygen in Linux?

Ssh-keygen is a tool for creating new authentication key pairs for SSH. Such key pairs are used for automating logins, single sign-on, and for authenticating hosts.

What format is ssh-keygen?

The supported key formats are: “RFC4716” (RFC 4716/SSH2 public or private key), “PKCS8” (PKCS8 public or private key) or “PEM” (PEM public key). By default OpenSSH will write newly-generated private keys in its own format, but when converting public keys for export the default format is “RFC4716”.

What is RSA in ssh-keygen?

Key-Based SSH Logins

SSH can use either "RSA" (Rivest-Shamir-Adleman) or "DSA" ("Digital Signature Algorithm") keys. Both of these were considered state-of-the-art algorithms when SSH was invented, but DSA has come to be seen as less secure in recent years.

Is Ed25519 better than RSA?

Ed25519 is probably the strongest mathematically (and also the fastest), but not yet widely supported. At least 256 bits long. RSA is the best bet if you can't use Ed25519. At least 3072 bits long.

How do you get the 2048 RSA key in Linux?

Run ssh-keygen command. $ ssh-keygen Generating public/private rsa key pair. ssh-keygen will generate a 2048 bit rsa key pair if no option is specified. You can change the key's bit size and type by using -b and -t options respectively as the following example.

What is passphrase in ssh-keygen?

SSH passphrases protect your private key from being used by someone who doesn't know the passphrase. ... A secure passphrase helps keep your private key from being copied and used even if your computer is compromised. The downside to passphrases is that you need to enter it every time you create a connection using SSH.

When performing an ssh-keygen What is the default public key name in Linux?

Command Line

Run it on your server with no options, or arguments to generate a 2048-bit RSA key pair (which is plenty secure). You will be prompted to select a file for the key pair. The default directory for SSH keys is ~/. ssh with the private key named id_rsa and the public key named id_rsa.

What does id_rsa stand for?

SSH uses public/private key pairs, so id_rsa is your RSA private key (based on prime numbers), which is more secure than your id_dsa DSA private key (based on exponents). Keep your private keys safe and share your id_rsa. pub and id_dsa.