Day 29/100 local SSH password free login to remote

2022-06-25 20:27:00 【SnowWolfArden】

1、 Turn on the key login mode on the server side

/etc/ssh/sshd_config


#  Whether to allow  root  Remote login 
PermitRootLogin yes

#  Whether password login is turned on 
PasswordAuthentication yes

#  Turn on public key authentication 
RSAAuthentication yes #  This parameter may not   No problem 
PubkeyAuthentication yes

#  The file location where the login user's public key is stored 
#  The location is under the home directory of the login user name  .ssh
# root  Namely  /root/.ssh
# foo  Namely  /home/foo/.ssh
AuthorizedKeysFile .ssh/authorized_keys

authorized_keys It's a document , It's not a folder

#  restart , Make the configuration work 
service sshd restart

2、 The client creates its own secret key pair


ssh-keygen -t rsa
#  If appear , Already exists , Situations that need to be covered , Name alias required , To avoid overwriting other configurations 

cd ~/.ssh/

#  View public key 
cat id_rsa.pub

#  Configure login alias   Save losing  ip  trouble 
# .ssh/config
vi config

Host workhost0 #  Login server alias  ssh examp  That's all right. 
    HostName 8.140.130.30 # The server to log in to ip
    Port 22
    User root # Login name 
    IdentityFile ~/.ssh/id_rsa # Your private key path 
    ServerAliveInterval 30
    TCPKeepAlive yes
    
#  You can configure multiple , To support multiple password free logins

3、 Add your public key to the server-side public key certificate

Copy the public key in the file to the remote host ~/.ssh/authorized_keys in , If you don't have this file , So please create a new .
authorized_keys It's a document , It's not a folder

4、 The client can log in without secret

ssh workhost0

### Small Tips

1、~ It's in the current user directory ,Linux Is in root Under the document （ Not in the outermost directory ）
2、 use VScode Open remote and local file directories , It can be omitted. Vim The cost of operating documents