software catalog

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+---
+title: "GNU Screen"
+category: "Terminal and shell"
+tagline: "The classic terminal multiplexer: detachable sessions that keep running."
+source: "pacman"
+package: "screen"
+command: "screen"
+website: "https://www.gnu.org/software/screen/"
+---
+
+## What it is
+
+GNU Screen runs several shells inside one terminal and lets you detach from them and reattach later, with everything still running. It predates tmux and is found on almost every Unix system, which makes it useful when you're working on older servers. It can also connect to serial devices.
+
+```
+screen -S work        # start a session; detach with Ctrl-a d, return with: screen -r work
+```
+
+## Why it's here
+
+- **Familiar.** If you learned Screen years ago, it's still here.
+- **Detachable sessions.** Jobs keep running after you close the terminal or lose SSH.
+- **Serial consoles.** `screen /dev/ttyUSB0 115200` talks to routers and boards.
+
+## On CoreDesktop
+
+Screen is installed from pacman with no extra setup. Type `screen` in a terminal. `update` keeps it current along with the rest of the pacman packages.