diff --git a/study/proc/README.md b/study/proc/README.md
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+http://blog.chinaunix.net/uid-26941022-id-3223594.html
+http://blog.csdn.net/njuitjf/article/details/16940865
+http://blog.chinaunix.net/uid-28253945-id-3382865.html
+http://blog.csdn.net/a_ran/article/details/37630101
+