每天⼀个linux命令--ssh的host配置⽤户名密码1、在终端输⼊cd ~/.ssh/
vi configssh命令行
输⼊服务器的⽤户名和密码
souche@kickseed:~/.ssh$ cat config
# 这是跳板机的配置，给跳板机的 IP 起个别名: jump_machine, ⽤户名: owen
Host feature
HostName 172.III.III.III
User XXX
2、⽣成 rsa 公钥和私钥: ssh-keygen -t rsa
tip：如果ssh的⽬录下⾯已经有公钥，就不⽤⽣成了
souche@kickseed:~/.ssh$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/souche/.ssh/id_rsa): 1HyKxJHtKz
1HyKxJHtKz already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in 1HyKxJHtKz.
Your public key has been saved in 1HyKxJHtKz.pub.
The key fingerprint is:
SHA256:PRQmfxrHWuWM5QgqTwd3OIsD8gPq70mf8JCzerVPzw8 souche@kickseed
The key's randomart image is:
+---[RSA 2048]----+
|        o =.. o  |
|    o .  Bo= O  |
|  . +..o.=oB +  |
|  .  o+o+.B    |
| .    .S.=      |
|  .  ..    .    |
|  .*. .. E      |
|  .oO.o o .    |
|  .++ +.. o..    |
+----[SHA256]-----+
souche@kickseed:~/.ssh$
3、 ssh-copy-id -i    密钥⽂件⽤户别名@服务器别名
souche@kickseed:~/.ssh$ ssh-copy-id -i id_rsa.pub  souche@feature
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
souche@172.17.41.58's password:
Number of key(s) added: 1
Now try logging into the machine, with:  "ssh 'souche@feature'"
and check to make sure that only the key(s) you wanted were added.
souche@kickseed:~/.ssh$ ssh-copy-id -i id_rsa.pub  souche@eva

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