Hello this is not one but three questions.
Please read it out to the end.
Assuming I have machines M1(office) and M2(home) located 1 km away. Both have sshd running
Q1. I am working on M1 on GUI. I lock it and go to M2 and want to see what I was doing on M1 remotely. Now I dont want to unlock M1 which is what happens when I use x0vncserver and all such stuff. I want the M1 screen to appear locked in office but should be able to use it in home.

Q2. Similar question for a tty of terminal. Suppose in my office I was working on a Virtual console or a tty and I have locked the room.
Now I come home and want to control that virtual console. Please tell me what can be done.I know the screen command but please suggest something else.

Q3. Suppose I run a program in terminal in such a way that it continues running even after I log out of that terminal. e.g. some game (It is possible for that program to continue running even after the terminal is closed). Now I fire up another terminal on the same machine (or connect remotely to that machine) and want to switch to that task. Please tell me how is that done.

I will be very thankful to whoever answers this question.

Thank you.

not a networking question. moved to Linux - Software.

Someone please answer this question. Reading it out to the end wont take too much of time. Dont mind the lenght of the question. Please read it out to the end and then Answer the question.
Or Atleast the moderators can reply and say no answer.
I am dying ot get an answer and will be grateful to whoever answers it.