diff --git a/sources/tech/20150518 10 Amazing and Mysterious Uses of Symbol or Operator in Linux Commands.md b/sources/tech/20150518 10 Amazing and Mysterious Uses of Symbol or Operator in Linux Commands.md
index 2b281b8e85..16795b92e8 100644
--- a/sources/tech/20150518 10 Amazing and Mysterious Uses of Symbol or Operator in Linux Commands.md	
+++ b/sources/tech/20150518 10 Amazing and Mysterious Uses of Symbol or Operator in Linux Commands.md	
@@ -1,3 +1,5 @@
+translating by wwy-hust
+
 10 Amazing and Mysterious Uses of (!) Symbol or Operator in Linux Commands
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 The `'!'` symbol or operator in Linux can be used as Logical Negation operator as well as to fetch commands from history with tweaks or to run previously run command with modification. All the commands below have been checked explicitly in bash Shell. Though I have not checked but a major of these won’t run in other shell. Here we go into the amazing and mysterious uses of `'!'` symbol or operator in Linux commands.
@@ -190,4 +192,4 @@ via: http://www.tecmint.com/mysterious-uses-of-symbol-or-operator-in-linux-comma
 本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
 
 [a]:http://www.tecmint.com/author/avishek/
-[1]:http://www.tecmint.com/12-top-command-examples-in-linux/
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+[1]:http://www.tecmint.com/12-top-command-examples-in-linux/