add user-unit wiki page

wiki/pages/user-units.md

@@ -0,0 +1,46 @@
+---
+author: ~ben
+published: true
+title: daemonize with user units
+description: a quick tutorial on creating and managing daemonized processes with systemd user units
+category: 
+    - main
+---
+
+# daemonize all the things
+
+so you've got a process that you want to keep running. you might have it in a
+tmux or screen session. let's use systemd user units to manage it!
+
+1. ensure that your user unit loadpath is set up:
+```bash
+mkdir -p ~/.config/systemd/user/
+```
+
+1. create a basic service. save something like this in ~/.config/systemd/user/my-new-service.service (adjusting where necessary)
+```bash
+[Unit]
+Description=foo
+
+[Service]
+ExecStart=/bin/bash -c "while true do; echo hi; done"
+
+[Install]
+WantedBy=default.target
+```
+
+1. enable it
+```bash
+systemctl --user enable --now my-new-service.service
+```
+
+1. enable-linger for your user account
+```bash
+loginctl enable-linger
+```
+this allows your user units to run even when you're not logged in.
+
+done!
+
+you can now use `systemctl --user` to manage your daemonized process.
+