執行指令碼前面需要先配置好/etc/hosts檔案的ip對映，這個指令碼是根據hosts檔案的ip進行免密登陸配置的
密碼可以自己修改PWD_1
執行需要聯網需要聯網

#!/bin/bash
#yum安裝expect
yum -y install expect
#PWD_1是登陸密碼，可以自己設定
PWD_1=123456
ips=$(cat /etc/hosts |grep -v "::" | grep -v "127.0.0.1")
key_generate() {
    expect -c "set timeout -1;
        spawn ssh-keygen -t rsa;
        expect {
            {Enter file in which to save the key*} {send -- \r;exp_continue}
            {Enter passphrase*} {send -- \r;exp_continue}
            {Enter same passphrase again:} {send -- \r;exp_continue}
            {Overwrite (y/n)*} {send -- n\r;exp_continue}
            eof             {exit 0;}
    };"
 

}
auto_ssh_copy_id () {
    expect -c "set timeout -1;
        spawn ssh-copy-id -i $HOME/.ssh/id_rsa.pub [email protected]$1;
            expect {
                {Are you sure you want to continue connecting *} {send -- yes\r;exp_continue;}
                {*password:} {send -- $2\r;exp_continue;}
                eof {exit 0;}
            };"
 

}
rm -rf ~/.ssh

key_generate

for ip in $ips
do
    auto_ssh_copy_id $ip  $PWD_1
done

本指令碼還有不完善的地方就是免密登陸只是單向進行，不能夠互相的的免密登陸，哪個大神能夠寫個更完整的請貼到下面評論區，謝謝