How do I create a ssh key with a specific name on linux?

addaxnasom

Also see:
ssh-keygen(1) — authentication key generation, management and conversion

Note: The passphrase should be cryptographically strong.

     -t dsa | ecdsa | ed25519 | rsa
             Specifies the type of key to create.  The possible values are
             “dsa”, “ecdsa”, “ed25519”, or “rsa”.

     -f filename
             Specifies the filename of the key file.

     -b bits
             Specifies the number of bits in the key to create.  For RSA keys,
             the minimum size is 1024 bits and the default is 2048 bits.  Gen‐
             erally, 2048 bits is considered sufficient.  DSA keys must be
             exactly 1024 bits as specified by FIPS 186-2.  For ECDSA keys,
             the -b flag determines the key length by selecting from one of
             three elliptic curve sizes: 256, 384 or 521 bits.  Attempting to
             use bit lengths other than these three values for ECDSA keys will
             fail.  Ed25519 keys have a fixed length and the -b flag will be
             ignored.

The default file name for RSA algorithm is id_rsa

$ ssh-keygen -t rsa -b 4096 -f ~/.ssh/training.id_rsa
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/training/.ssh/training.id_rsa.
Your public key has been saved in /home/training/.ssh/training.id_rsa.pub.
The key fingerprint is:
SHA256:YKHv33XSuhLTBecHVaDSPQWQQ4l46eh6T4VSbMWIICc training@universe
The key's randomart image is:
+---[RSA 4096]----+
|      E o. o.O++.|
|     . =  oo*=*  |
|    . o   .=*.+. |
|     o .. +++. o |
|      . S+.+. .  |
|     .    +.oo   |
|      .  . ++ o  |
|       ...oo +   |
|        ...o+.   |
+----[SHA256]-----+