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Thêm các link linux tuts:
http://www.ibm.com/developerworks/library/l-lpic1-v3-103-8/index.html

bài này trình bày rất dễ hiểu cho một tut khó trình bày như Vim.
http://www.ibm.com/developerworks/vn/library/l-lpic1-v3-103-1/

https://www.ibm.com/developerworks/library/l-lpic1-map/index.html

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