I use ssh to log into a remote machineand then I use the screen command to create a virtual screen.Now, if I type in exitnormally I should only exit the screen and return to the remote ssh terminalbut the reality is the exit command exits the ssh and I return to the local terminal. Why?Besides, if I run a program/process in the virtual screen, I can't use C-a d to return to the remote ssh terminal, it just echoes back ^A^A^A^A^A^A^A^A^A^A^A^A^A^, and doesn't return to the remote ssh terminal.root@remote_lab:/home/esy# time bash test.sh  2>&1|cat > tempWhat could be going wrong?
After running screen, screen doesn't seem to be running
linux;gnu screen