Document systemd socket activation

NixOS · Sep 20, 2021 · 7639578 · 7639578
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commit 7639578
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diff --git a/src/nix/daemon.md b/src/nix/daemon.md
@@ -31,4 +31,18 @@ management framework such as `systemd`.
 
 Note that this daemon does not fork into the background.
 
+# Systemd socket activation
+
+`nix daemon` supports systemd socket-based activation using the
+`nix-daemon.socket` unit in the Nix distribution. It supports
+listening on multiple addresses; for example, the following stanza in
+`nix-daemon.socket` makes the daemon listen both on a Unix domain
+socket and on port 1234:
+
+```
+[Socket]
+ListenStream=/nix/var/nix/daemon-socket/socket
+ListenStream=1234
+```
+
 )""