diff --git a/sources/tech/20181010 An introduction to using tcpdump at the Linux command line.md b/sources/tech/20181010 An introduction to using tcpdump at the Linux command line.md
index 6998661f23..b498d0ca43 100644
--- a/sources/tech/20181010 An introduction to using tcpdump at the Linux command line.md	
+++ b/sources/tech/20181010 An introduction to using tcpdump at the Linux command line.md	
@@ -1,3 +1,5 @@
+[translation by jrg]
+
 An introduction to using tcpdump at the Linux command line
 ======