linux自动应答，实现ssh免密码登陆

不念不忘少年蓝@ 2022-04-24 02:34 366阅读 0赞

# 1,多节点：相同root密码 #

安装ssh服务后，执行以下命令：　即可自动完成免密码登陆本机

# 1，生成密钥
    [ ! -f ~/.ssh/id_rsa ] && ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa  #&& cat ~/.ssh/id_rsa.pub  >> ~/.ssh/authorized_keys && chmod 600  ~/.ssh/authorized_keys
    sed  -i '/#   StrictHostKeyChecking/aStrictHostKeyChecking no' /etc/ssh/ssh_config
    # 配置ssh：不验证主机，并使用sshpass拷贝密钥
    sed -i s/'#   StrictHostKeyChecking ask'/'StrictHostKeyChecking no'/  /etc/ssh/ssh_config 
    
    ##a, 单个分发密钥： 
    sshpass -p'123456' ssh-copy-id localhost
    
    ##b, 批量分发密钥： awk , sed
    [root@c7 ~]# rpm -q sshpass
    sshpass-1.06-1.el6.x86_64
    
    [root@c7 ansible-cdh-el6-playbook]# cat /tmp/h2.txt
    agent1 ansible_host=192.168.56.170 ansible_port=22 ansible_ssh_user=root ansible_ssh_pass=vagrant
    server ansible_host=192.168.56.171 ansible_port=22 ansible_ssh_user=root ansible_ssh_pass=vagrant
    [root@c7 ansible-cdh-el6-playbook]# echo $str | awk -F'[ =]' '{print "sshpass -p"$9,"ssh-copy-id",   $7"@"$3 }' /tmp/h2.txt
    sshpass -pvagrant ssh-copy-id root@192.168.56.170
    sshpass -pvagrant ssh-copy-id root@192.168.56.171
    
    [root@c7 ~]# cat a.txt            #ip, user, pass
    192.168.56.170 root vagrant
    192.168.56.171 root vagrant
    [root@c7 ~]# sed -r 's/(\S+)\s*(\S+)\s*(\S+)/sshpass -p\3 ssh-copy-id \2@\1 /' a.txt  
    sshpass -pvagrant ssh-copy-id root@192.168.56.170 
    sshpass -pvagrant ssh-copy-id root@192.168.56.171

# 2, 多节点：不同root密码 #

[root@eadage ~]# cat pwd.txt 
    192.168.31.20 11111
    192.168.31.21 22222
    192.168.31.21 33333
    192.168.31.21 44444
    
    [root@eadage ~]# cat key.sh 
    for x in `seq 4`
    do
      echo "====node "$x"==========="
      ip=`awk -v num=$x 'NR==num{print $1}' key.txt`
      password=`awk -v num=$x 'NR==num{print $2}' key.txt`
      echo "ip,password:  "$ip,$password
      
      echo sshpass -p $password ssh-copy-id $ip
      sshpass -p $password ssh-copy-id $ip
    done
    
    
    ############# 验证结果　###############
    [root@eadage ~]# ./key.sh 
    ====node 1===========
    ip,password:  192.168.31.20,11111
    sshpass -p 11111 ssh-copy-id 192.168.31.20
    ====node 2===========
    ip,password:  192.168.31.21,22222
    sshpass -p 22222 ssh-copy-id 192.168.31.21
    ====node 3===========
    ip,password:  192.168.31.21,33333
    sshpass -p 33333 ssh-copy-id 192.168.31.21
    ====node 4===========
    ip,password:  192.168.31.21,44444