Screen (#1585)

* Create screen.md

* better formatting

* period because ocd

screen.md

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+---
+title: Screen
+category: CLI
+layout: 2017/sheet
+updated: 2020-12-05
+keywords:
+  - Screen
+  - Linux
+  - Unix
+  - CLI
+  - Command
+  - Line
+intro: |
+  Screen or GNU Screen is a terminal multiplexer. In other words, it means that you can start a screen session and then open any number of windows (virtual terminals).
+  This does not contain **all** of screen's commands and options, read [GNU's manual](https://www.gnu.org/software/screen/manual/screen.html#Commands) to see everything
+---
+
+## Basics
+{: .-three-column}
+
+### CLI Options
+
+| Options           | Description                               |
+| ----------------- | ----------------------------------------- |
+| `-S`              | Starts a named session                    |
+| `-r [name]`       | Reattach to a screen (optionally by name) |
+| `-ls` or `--list` | Returns a list of session ids             |
+
+### Screens
+
+| Keybind         | Description                                                                              |
+| --------------- | ---------------------------------------------------------------------------------------- |
+| `ctrl+a c`      | Create a new screen tab inside a screen                                                  |
+| `ctrl+a [0-9]`  | Switch to a screen tab by number 0 through 9                                             |
+| `ctrl+a n`      | Go to the next screen tab                                                                |
+| `ctrl+a p`      | Go to the previous screen tab                                                            |
+| `ctrl+a k`      | Kill current screen tab                                                                  |
+| `ctrl+a ctrl+d` | Detach the current screen and go back to the terminal (screen windows will stay running) |
+
+### Visual pleasure
+
+| Keybind                         | Description                  |
+| ------------------------------- | ---------------------------- |
+| `ctrl+a S`                      | Split a screen horizontally  |
+| `ctrl+a |`                      | Split a screen vertically    |
+| `ctrl+a ctrl+I` or `ctrl+a tab` | Change screen split          |
+| `ctrl+a Q`                      | Remove all screen splits     |
+| `ctrl+a C`                      | Clear the current screen tab |
+
+### Accessibility
+
+| Keybind         | Description                                         |
+| --------------- | --------------------------------------------------- |
+| `ctrl+a A`      | Rename current screen tab                           |
+| `ctrl+a k`      | Kill current screen tab                             |
+| `ctrl+a ctrl+a` | Switch to last used screen tab                      |
+| `ctrl+a a`      | Send `ctrl+a` to current screen tab                 |
+| `ctrl+a ctrl+w` | See a list of all screen tabs in the current screen |