diff --git a/README.md b/README.md
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-# usefull-oneliners
+# Usefull Oneliners
 
-Usefull Oneliners
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+## vim
+
+* Set tab to 4 spaces: `set tabstop=8 softtabstop=0 expandtab shiftwidth=4 smarttab`
+
+
+References
+------
+* https://stackoverflow.com/questions/1878974/redefine-tab-as-4-spaces
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