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This article mainly shows you "Linux how to count rows", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "Linux how to count rows" this article.

Description: blue = command name

Light green = command parameter

Light blue = option

Purple = catalog

System environment: CentOS 6.2i686

I. Statistical method of the number of rows

1. System command: wc-l filename

2. Grep method: grep-c "" filename

3. Sed method: sed-n'$= 'filename

4. Awk method: awk 'END {print NR}' filename

II. Efficiency testing

Generate the required files for the test: awk 'BEGIN {for

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