Using screen to attach and detach console sessions
If you run a program in SSH, and then close out ssh you can not get back into the console.
However you can use screen to attach + detach a console.
If you have centos, run
yum -y install screen
If you have debian/ubuntu run
apt-get install screen
Once installed, screen is simple to use. Type
run the command you want to run, for example
to detach run: ctrl + a + d
Once detached you can check current screens with
Use screen -r to attach a single screen.
On multiple screens you may see something like:
There are screens on:
4 Sockets in /var/run/screen/S-root.
In this case attach with the value before pts, for example
screen -r 344074
You can shorthand with screen -r 3 (assuming only one begins with the number 3).