實現自動SSH連接

#!/usr/bin/expect  
set timeout 10  
set username [lindex $argv 0]  
set password [lindex $argv 1]  
set hostname [lindex $argv 2]  
#set username ftpuser
#set password ftpuser
#spawn 模擬終端交互
#ssh-copy-id將本機當前用戶的ssh登錄公鑰copy到目標機器上
# "*(yes/no)*" 返回內容包含yes/no，表示添加host到已知host
#password 表示要輸入目標機器的密碼
#"*please*"，"*Permission denied*" 錯誤，沒法成功添加ssh公鑰到目標機器
#"*All keys were skipped*"，"*you wanted were added*" 已添加過，則直接跳過。

spawn ssh-copy-id $username@$hostname
expect {
            "*(yes/no)*" {
                send "yes\r"; 
                exp_continue;
            }
            
            "password:" {
                send "$password\r";
                exp_continue;
            }
            "*please*" { exit 5 }
            "*All keys were skipped*" { exit }
            "*you wanted were added*" {exit }
            "*Permission denied*" { exit 6 }
        }
expect eof

#1.保存上面的代碼爲sh文件，並設置文件具有執行權限
#2.如下使用
./auto_ssh.sh "username" "passpord" "ip"