前言

本文将针对提升SSH访问VM，生成密钥，用密钥登录虚机

一、生成密钥

root@mgt01:~# ssh-keygen -b 2048 -t rsa -f id_rsa
Generating public/private rsa key pair.
id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in id_rsa
Your public key has been saved in id_rsa.pub
The key fingerprint is:
SHA256:sTsVyhnguYufZHM4WVU5oBYW++RltVUgfxgeh2RYLfQ root@mgt01
The key's randomart image is:
+---[RSA 2048]----+
|      . +...o*X+=|
|     . + + .+*oO.|
|      o * + o.=.E|
|       + @ +   . |
|      . S +      |
|     . = o       |
|    . O +        |
|     + = .       |
|      o          |
+----[SHA256]-----+

二、SSH登录虚机

1.查找私钥文件

find <path> | grep <fileName>

2.SSH登录虚机

ssh -i <私钥文件路径> -p 6233 root@100.122.0.189

三、登录过程中遇到的问题

1、密钥文件权限不足，导致ssh登录虚机报错

2、修改密钥文件权限

chmod 600 test1/id_rsa_test

root@mgt01:~# ls -l test1/id_rsa_test
-rw------- 1 root root 1876 Sep 23 14:21 test1/id_rsa_test