只需 使用一个空白通 使用
-N标志：
ssh-keygen -t rsa -N ''
要覆盖密钥文件 （在此示例中
id_rsa）：
ssh-keygen -q -t rsa -N '' -f ~/.ssh/id_rsa 2>/dev/null <<< y >/dev/null
从
ssh-keygen手册 页：
-N new_passphrase provides the new passphrase. -q silence ssh-keygen. -f filename specifies the filename of the key file.
逐步说明
$ ssh-keygen -t rsaGenerating public/private rsa key pair.Enter file in which to save the key (/home/klashxx/.ssh/id_rsa):
1 ）为避免输入密钥，请使用
-f：
$ ssh-keygen -t rsa -f ~/.ssh/id_rsaGenerating public/private rsa key pair./home/klashxx/.ssh/id_rsa already exists.Overwrite (y/n)?
2 ）现在我们需要对 覆盖问题 自动回答“ y ” （让我们为该作业使用
here字符串 ）： __
__
$ ssh-keygen -t rsa -f ~/.ssh/id_rsa <<< yGenerating public/private rsa key pair./home/klashxx/.ssh/id_rsa already exists.Overwrite (y/n)? Enter passphrase (empty for no passphrase):
3 ）最后，我们将使用该
-N标志输入无效通行证：
$ ssh-keygen -t rsa -N '' -f ~/.ssh/id_rsa <<< yGenerating public/private rsa key pair./home/klashxx/.ssh/id_rsa already exists.Overwrite (y/n)? Your identification has been saved in /home/klashxx/.ssh/id_rsa.Your public key has been saved in /home/klashxx/.ssh/id_rsa.pub.The key fingerprint is:SHA256:Xo0t6caMB/8TSsigxfY28JIfqYjyqxRZrFrPncx5yiU klashxx@serverThe key's randomart image is:+---[RSA 2048]----+| || . || o .|| + * = || +. + BSo= o ||...o.+o+XO... ||.. .o.E==+B. . ||o . ...=.o... ||.+o. o .. |+----[SHA256]-----+
4 ） 多余的球 ，清理输出，只需检查返回码：
$ ssh-keygen -q -t rsa -N '' -f ~/.ssh/id_rsa 2>/dev/null <<< y >/dev/null$ echo $?0
荣誉
@ lukasz-dynowski，@ redochka，@ mellow-yellow和该线程中的其他成员。
