S12. Verify multi host SSH mutual access script based on key

be based on key Verify multi host ssh visit

[[email protected] ~]# cat ssh_key.sh 
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-20
#FileName: ssh_key.sh
#URL: raymond.blog.csdn.net
#Description: ssh_key for CentOS 7/8 & Ubuntu 18.04/24.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
# be based on key Verify multi host ssh Visit each other 
COLOR="echo -e \\033[01;31m"
END='\033[0m'
PASS=123456
# Set the last address of the network segment ,4-255 Between , The smaller the scan, the faster 
END=254

IP=`ip a s eth0 | awk -F'[ /]+' 'NR==3{print $3}'`
NET=${IP%.*}.

os(){
    
    OS_ID=`sed -rn '/^NAME=/[email protected]*="([[:alpha:]]+).*"[email protected]\1@p' /etc/os-release`
}

ssh_key_push(){
    
    rm -f /root/.ssh/id_rsa
    [ -e ./SCANIP.log ] && rm -f SCANIP.log
    for((i=3;i<="$END";i++));do
        ping -c 1 -w 1  ${NET}${i} &> /dev/null  && echo "${NET}${i}" >> SCANIP.log &
    done
    wait
    ssh-keygen -f /root/.ssh/id_rsa -P '' &> /dev/null
    if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;then
        rpm -q sshpass &> /dev/null || {
     ${COLOR}" install sshpass software package "${END};yum -y install sshpass &> /dev/null; }
    else
        dpkg -S sshpass &> /dev/null || {
     ${COLOR}" install sshpass software package "${END};apt -y install sshpass &> /dev/null; }
    fi
    sshpass -p ${PASS} ssh-copy-id -o StrictHostKeyChecking=no ${IP} 

    AliveIP=(`cat SCANIP.log`)
    for n in ${AliveIP[*]};do
        sshpass -p $PASS scp -o StrictHostKeyChecking=no -r /root/.ssh [email protected]${n}:
    done

    # hold .ssh/known_hosts Copy to all hosts , So that they don't need to enter carriage return when they visit each other for the first time 
    for n in ${AliveIP[*]};do
        scp /root/.ssh/known_hosts ${n}:.ssh/
    done
}

main(){
    
    os
    ssh_key_push
}

main