Just documenting the Linux Screen command.

Install screen first.

<pre lang="bash">
yum install screen
dnf install screen
apt install screen
zypper install screen

Start a new screen.

<pre lang="bash">
screen -S one
screen -S two
screen -S three

Detach from screen.

<pre lang="bash">
Ctrl+a+d

List active screens.

<pre lang="bash">
screen -ls 
There is a screen on:
        15575.one   (Detached)
        15581.two   (Detached)
        15593.three (Detached)
1 Socket in /var/run/screen/S-root.

Reattach to an existing screen.

<pre lang="bash">
screen -r one
screen -r two
screen -r three

If there’s only one active screen, you can run screen -r without the name.

<pre lang="bash">
screen -r

To exit or quit a screen, reattach and run exit.

<pre lang="bash">
screen -r three
# exit
[screen is terminating]