Update xwd calls in X-hacks post.

diff --git a/posts/X_hacks.mdwn b/posts/X_hacks.mdwn
index ed3b2e020d19a5f6393dc647457e7cac4966615b..f823d0d52317782a84b0c2d663342a0cc9c9d58c 100644 (file)
--- a/posts/X_hacks.mdwn
+++ b/posts/X_hacks.mdwn
@@ -19,11 +19,11 @@ Here are some examples:
 
 Grab whole desktop as a png:
 
-    $ xwd -root -silent - | convert - root.png
+    $ xwd -root -silent -out /dev/stdout | convert - root.png
 
 Grab single window as a png:
 
-    $ xwd -id windowid -silent - | convert - win.png
+    $ xwd -id windowid -silent -out /dev/stdout | convert - win.png
 
 Determine which window has the focus: