add root reboot command

check_router_reboot.jl

@@ -157,18 +157,40 @@ function check_router_once(ip::AbstractString; timeout=TIMEOUT_SECS)
     end
 end
 
+# Check if running as root
+function is_root()::Bool
+    try
+        result = read(`whoami`, String)
+        return strip(result) == "root"
+    catch
+        return false
+    end
+end
+
 # Reboot command selection
 # Return program and separate args as plain strings
 function reboot_command()
     if Sys.iswindows()
         return ("/usr/bin/cmd", "/C", "shutdown /r /t 0")
     elseif Sys.isapple()
-        return ("/usr/bin/sudo", "shutdown", "-r", "now")
-    elseif Sys.islinux()
-        if isfile("/bin/systemctl") || isfile("/usr/bin/systemctl")
-            return ("/usr/bin/sudo", "systemctl", "reboot")
+        if is_root()
+            return ("/sbin/reboot")
         else
-            return ("/usr/bin/sudo", "reboot")
+            return ("/usr/bin/sudo", "shutdown", "-r", "now")
+        end
+    elseif Sys.islinux()
+        if is_root()
+            if isfile("/bin/systemctl")
+                return ("/bin/systemctl", "reboot")
+            else
+                return ("/usr/sbin/reboot")
+            end
+        else
+            if isfile("/bin/systemctl") || isfile("/usr/bin/systemctl")
+                return ("/usr/bin/sudo", "systemctl", "reboot")
+            else
+                return ("/usr/bin/sudo", "reboot")
+            end
         end
     else
         return nothing