expect实现ssh自动交互

cat >ssh.exp <<\! #没有!之前的\，那么set的变量不被here doc产生的ssh.exp生效。原因未知
    #!/usr/bin/expect     set timeout 60     set pwd "123456"    spawn ssh  172.18.0.1
           expect {
                    "not know" {send_user "[exec echo \"not know\"]";exit}
                    "(yes/no)?" {send "yes\r";exp_continue}
                    "password:" {send  "$pwd\r"}
                    "Permission denied, please try again." {
                        send_user "[exec echo \"Error:Password is wrong\"]"
                        exit  }
expect eof                    }
expect "*#"send "/etc/init.d/keepalived stop\r"
send "sh ./chg_keepalived.sh &\r"send "\r"send "exit\r"expect eof
!

ip,command,password可以在一个文件里，直接写：

然后while read x;do expect ssh.exp $i;done

假如要记录日志，直接在set下添加

log_file $ip.log

========= 注意expect eof ====================