[openssl]PEM例程：get_name:无起始行：../crypto/PEM/PEM_lib.c:745:预期：任何私钥

我在创建证书请求时遇到问题。 我创建ecdsa密钥对

>ssh-keygen-t ecdsa

Generating public/private ecdsa key pair.
Enter file in which to save the key (/home/test_admin/.ssh/id_ecdsa): id_ecdsa.key
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in id_ecdsa.key
Your public key has been saved in id_ecdsa.key.pub
The key fingerprint is:
SHA256:a3VgM5p1/BVQMltvHFjXg2PvOK5mageZQzOGh92a+78 test_admin@ssh-ubuntu
The key's randomart image is:
+---[ECDSA 256]---+
|             +**o|
|           . ==o*|
|        + B +.o *|
|       o % * . + |
|        S O . +  |
|         X . o . |
|        o + . .  |
|       . o + .   |
|        ..*ooE.  |
+----[SHA256]-----+

当我创建请求时

>openssl-req-new-out-cert\u ecdsa.req-key-id\u ecdsa.key

和得到错误

unable to load Private Key
139664342951232:error:0909006C:PEM routines:get_name:no start line:../crypto/pem/pem_lib.c:745:Expecting: ANY PRIVATE KEY

我做错了什么