Unix File Extension

This useful little snippet can be used to find the unique list of extensions for all files in a directory and all its subdirectories.  I can never remember the precise awk incantation for this:

$ find . -type f | awk -F. '{print $NF}' | tr '[:upper:]' '[:lower:]' | sort -u

About Steven Engelhardt, CFA, AIF
Adjunct Professor of Software Engineering at DePaul University • Software Engineering, Data & Analytics in FinTech • Lives in Chicago, IL

One Response to Unix File Extension

  1. find . -type f -name ‘?*.*’ | awk -F. ‘!x[$NF]++ { print $NF }’

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