diff --git a/system/linux/system.nix b/system/linux/system.nix
index d186d43..90cfa32 100644
--- a/system/linux/system.nix
+++ b/system/linux/system.nix
@@ -12,4 +12,14 @@
   # Disable coredumps to prevent filling up /var/lib/systemd/coredump/
   # Coredumps can quickly consume large amounts of disk space
   systemd.coredump.enable = false;
+
+  # Disable core dumps.
+  security.pam.loginLimits = [
+    { domain = "*"; item = "core"; type = "hard"; value = "0"; }
+  ];
+
+  # Don't shutdown when power button is short-pressed.
+  services.logind.extraConfig = ''
+    HandlePowerKey=ignore
+  '';
 }