diff --git a/sources/tech/RHCSA Series/RHCSA Series--Part 01--Reviewing Essential Commands and System Documentation.md b/sources/tech/RHCSA Series/RHCSA Series--Part 01--Reviewing Essential Commands and System Documentation.md
index 9b32c93453..0155034c35 100644
--- a/sources/tech/RHCSA Series/RHCSA Series--Part 01--Reviewing Essential Commands and System Documentation.md	
+++ b/sources/tech/RHCSA Series/RHCSA Series--Part 01--Reviewing Essential Commands and System Documentation.md	
@@ -1,3 +1,5 @@
+[translating by xiqingongzi]
+
 RHCSA Series: Reviewing Essential Commands & System Documentation – Part 1
 ================================================================================
 RHCSA (Red Hat Certified System Administrator) is a certification exam from Red Hat company, which provides an open source operating system and software to the enterprise community, It also provides support, training and consulting services for the organizations.
@@ -310,4 +312,4 @@ via: http://www.tecmint.com/rhcsa-exam-reviewing-essential-commands-system-docum
 [7]:http://www.tecmint.com/redhat-enterprise-linux-7-installation/
 [8]:http://www.tecmint.com/echo-command-in-linux/
 [9]:http://www.tecmint.com/pwd-command-examples/
-[10]:http://www.tecmint.com/view-contents-of-file-in-linux/
\ No newline at end of file
+[10]:http://www.tecmint.com/view-contents-of-file-in-linux/