diff --git a/sources/tech/20180529 How To Add Additional IP (Secondary IP) In Ubuntu System.md b/sources/tech/20180529 How To Add Additional IP (Secondary IP) In Ubuntu System.md
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 How To Add Additional IP (Secondary IP) In Ubuntu System
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 Linux admin should be aware of this because it’s a routine task. Many of you wondering why we need to add more than one IP address in server? why we need add this to single network card? am i right?