Line

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wikipedia:line

Count lines:

Concatenate lines:

New line:

Merge every two lines:

  • cat /path/tofile.txt | paste -d " " - -[1]
  • cat /path/tofile.txt | xargs -n2 -d'\n'

Add line:

  • grep -qxF 'your text "additional text"' yourfile.txt || echo 'your text "additional text"' >> yourfile.txt

Remove first line:

Activities

Related

See also

  • https://stackoverflow.com/a/9605450
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