Automating “enter” keypresses for bash script generating ssh keys

Question

I would like to create script, which simply runs ssh-keygen -t rsa. But how to pass to it 3 times enter?

Answer 1

It is recommended to use ed25519 for security and performance.

yes "y" | ssh-keygen -o -a 100 -t ed25519 -C "Bla Bla" -f /mypath/bla -N ""

here

-o OpenSSH key format instead of older PEM (needs OpenSSH 6.5+)

-a Number of primality test while screening DH-GEX candidates

-t Type of key (ed25519, RSA, DSA etc.)

-f /mypath/bla The output file path and name

-N "" Use empty passphase

and yes "y" for no interaction.

It will generate two files

/mypath/bla
/mypath/bla.pub

where the bla file is private and bla.pub is public.