[SSH]生成密钥
查询
验证本地是否已存在密钥
$ cd ~/.ssh/
查看是否存在id_dsa
或id_rsa
命名的文件,其中.pub
文件是公钥
生成
在本地生成密钥,使用ssh-keygen
进行,默认生成id_rsa
文件在~/.ssh
文件夹内
$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/zj/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/zj/.ssh/id_rsa.
Your public key has been saved in /home/zj/.ssh/id_rsa.pub.
The key fingerprint is:
...
...
其中会要求你输入两次密码,也可以为空
$ ls
id_rsa id_rsa.pub ...
自定义
指定密钥加密算法、密钥长度、密钥标签、密钥文件名
$ ssh-keygen -t rsa -b 4096 -C "github.com" -f ~/.ssh/github_id_rsa
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/zj/.ssh/github_id_rsa.
Your public key has been saved in /home/zj/.ssh/github_id_rsa.pub.
The key fingerprint is:
SHA256:WRZktNSVoY+a5hAgNwou
...
...
-t
指定加密算法,当前设置为rsa
加密算法-b
指定密钥长度-C
指定了标签-f
指定生成文件名
当你已经存在github_id_rsa/github_id_rsa.pub
文件时,会提示你是否重载
重设密钥
重新设置密钥密码
$ ssh-keygen -p
Enter file in which the key is (/home/zj/.ssh/id_rsa): # 默认是id_rsa文件,点击Enter键;否则,输入正确文件地址
Enter old passphrase: # 输入旧密码
Enter new passphrase (empty for no passphrase): # 输入新密码
Enter same passphrase again: # 重复新密码
Your identification has been saved with the new passphrase.
或者加上参数-f
指定要修改的文件
$ ssh-keygen -p -f /home/zj/.ssh/github_id_rsa
Enter old passphrase:
Enter new passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved with the new passphrase.
或者加上参数-P
指定旧密码、-N
指定新密码
$ ssh-keygen -p -P zhujian -N 123456 -f ~/.ssh/github_id_rsa
Your identification has been saved with the new passphrase.