sometimes I cannot Attach a screen

[郑森林]

Dear author:

    We use gun screen on my work. use it any time. but I have some problem about Attach a screen.

    for example, on my linux server have these screen list.

# screen -ls

4055.hefu1 (Detached)

40553.hefu11 (Detached)

4055.hefu11 (Detached)

40556.hefu2 (Detached)

34055.hefu2 (Detached)

 I want to attach hefu1

 when I try screen -r hefu1 it doesn't work

 when I try screen -r 4055   it doesn't work

So I have write a small shell (./screen_tool.sh) tool to attach screen 

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

#!/bin/bash

# name: screen_tool.sh

# use: ./screen_tool.sh hefu1

name="$1"

scrname=$(screen -ls | grep -w "[0-9]*._\?${name}" | awk '{print $1}')

screen -r $scrname

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

this shell is to get 4055.hefu1 , so I can use command   screen -r 4055.hefu1   to attach it.

another problem: 

when I open many screen id on the same linux server at the same time. I use  ./screen_tool.sh to attach. I also can  not attach the screen sometimes.

Does screen can not attach many screen at the same time ?

thanks very much. hope you can reply me.

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致 礼！

                     郑森林，fivetrees