[Linux] passphrase 대화 프롬프트 없이 ssh-keygen 실행하기

ssh-keygen -f $HOME/.ssh/id_rsa -t rsa -N ''

https://linux.die.net/man/1/ssh-keygen

ssh-keygen -p [-P old_passphrase] [-Nnew_passphrase] [-f keyfile]

ssh-keygen -i [-f input_keyfile]

ssh-keygen -e [-f input_keyfile]

ssh-keygen -y [-f input_keyfile]

ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]

ssh-keygen -l [-f input_keyfile]

ssh-keygen -B [-f input_keyfile]

ssh-keygen -D reader

ssh-keygen -F hostname [-f known_hosts_file] [-l]

ssh-keygen -H [-f known_hosts_file]

ssh-keygen -R hostname [-f known_hosts_file]

ssh-keygen -U reader [-f input_keyfile]

ssh-keygen -r hostname [-f input_keyfile] [-g]

ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]

ssh-keygen -T output_file -f input_file [-v] [-a num_trials] [-W generator]

ssh-keygen [-n] [-D smartcard]