#!/bin/bash 

for env in a b c; do

  # 构造screen会话名
  screen_name="screen_$env"

  # 使用-S参数直接停止指定会话
  screen -S $screen_name -X quit

  # 或者使用PID停止
  # screen_pid=$(screen -list | grep $screen_name | awk '{print $1}')
  # kill $screen_pid
done