shenjianlin@newdev:~(spider)$ screen -ls There are screens on:     400.pts-4.newdev    (Detached)    14148.pts-6.newdev    (Attached)    7747.pts-7.newdev    (Detached)    540.pts-4.newdev    (Detached)    23163.pts-1.newdev    (Detached)    868.pts-1.newdev    (Detached)    9526.pts-1.newdev    (Detached)    3955.pts-2.newdev    (Detached)8 Sockets in /var/run/screen/S-shenjianlin. shenjianlin@newdev:~(spider)$ screen -r 14148.pts-6.newdev There is a screen on:     14148.pts-6.newdev    (Attached) There is no screen to be resumed matching 14148.pts-6.newdev. shenjianlin@newdev:~(spider)為啥有時候screen 掛著，我后來起不來呢？