ssh secure, remote connectivity to distribute keys

　First, the need to enter a password to access the back-end server command to connect to the specified server more secure from malicious connection

　　1. Create a key pair management information ends

• • ssh-keygen -t dsa  
  • ll /root/.ssh (to see if successfully created)

　　2. distribute the public key information management side

• • ssh-copy-id -i /root/.ssh/id_dsa.pub [email protected] (target server address)

  • ssh-copy-id command principles
    01. ssh and remote host connection
    02. The transfer public key file to the remote host, /root/.ssh/
    save the public key file contents to /root/.ssh/authorized_keys (600) (only root user to see)

　 Second, the script distribute multiple hosts public key (no scripting before ansible)

　　1. Ignore enter confirmation:

• • ssh -o StrictHostKeyChecking=no

　　2. Ignore password information:

• • yum install -y sshpass
  • sshpass -pxxxxx (root password) ssh xxx.xxx.xxx.xxx (server IP address information)

  • Scripting:

    • #!/bin/bash
      . /etc/init.d/functions

      {7,31,41} in IP for
      do
      echo "==================== 172.16.1. $ IP Start Key ======== fenfa ============ "
      sshpass -p123456 SSH-Copy-StrictHostKeyChecking ID = -i -o /root/.ssh/id_dsa.pub NO 172.16.1. $ & IP> / dev / null
      IF [$? -eq 0]
      the then
      echo "public key distribution success" / bin / to true
      echo ""
      the else
      echo "public key distribution failed" / bin / false
      echo ""
      fi
      DONE