今天当我使用这个命令在我的 CentOS 7.x 中生成一个 rsa 密钥时，当我使用回车确认我的命令时，但输出是^M，发生了什么？
[root@izbp19pke6x0v6ruecuy1yz ~]# ssh-keygen -t rsa -b 4096 -C jiangtingqiang@gmail.com
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): ^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^M^C
[root@izbp19pke6x0v6ruecuy1yz ~]# ssh-keygen -t rsa -b 4096 -C jiangtingqiang@gmail.com
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): github-actions^C
[root@izbp19pke6x0v6ruecuy1yz ~]# ssh-keygen -t rsa -b 4096 -C jiangtingqiang@gmail.com
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): ^M^M^M^M^C …linux ×1