Remove all empty lines in a file

How to Remove all empty lines in a file on Linux and Windows?

Remove empty lines from file.txt via Linux command line

  • Option 1: sed -i ‘/^$/d’ file.txt
  • Option 2: awk ‘NF > 0’ file.txt > output.txt
  • Option 3: perl -i.backup -n -e “print if /\S/” file.txt
  • Option 4: grep . file.txt > output.txt

Remove empty lines from file.txt using Powershell script on Windows

  • (gc file.txt) | ? {$_.trim() -ne “” } | set-content file.txt



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