Linux 跳板机脚本

先生成和分发秘钥：

ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa
ssh-copy-id -i  .ssh/id_dsa.pub centos2
ssh-copy-id -i  .ssh/id_dsa.pub centos2

编写脚本 tiaoban.sh

#!/bin/sh
function trapper(){
  trap '' INT QUIT TSTP TERM HUB
}
function menu(){
        cat <<EOF
==============Host List==============
        2-centos2
        3-centos3
        0-Exit system
=====================================
EOF
}
function host(){
    case "$1" in
      2)
        ssh $USER@centos2
      ;;
      3)
        ssh $USER@centos3
      ;;
      0)
        exit 0
      esac
}
function main(){
   while true
     do
        trapper
        clear
        menu
        read -p "Pls input your choice:" num
        host $num
     done
}
main