title: File created in linux transferred to Windows shows corrupted
body: <p>I have created an Excel file from delimted text file using awk in linux terminal transferring the same to windows. when opened it shows a pop-up "This file might be corrupted or unsafe.would you like to open?"But on tapping yes I could see data everything is fine as expected.How to avoid such pop-up.
  I have tried to convert to .xlsx then I couldn't even see the data
  I tried to zip and send then unzip same warning popsup</p>