https://unix.stackexchange.com/questions/18506/recursive-statistics-on-file-types-in-directory
find . -type f | sed 's/.*\.//' | sort | uniq -c
find . -type f| ruby -ne 'puts $1 if $_ =~ /.*\.(\S+)/ ' | sort | uniq -c
https://unix.stackexchange.com/questions/18506/recursive-statistics-on-file-types-in-directory
find . -type f | sed 's/.*\.//' | sort | uniq -c
find . -type f| ruby -ne 'puts $1 if $_ =~ /.*\.(\S+)/ ' | sort | uniq -c
cat - > /tmp/columns.txt # then paste
cat columns.txt | cut -d" " -f2 # default delim is tab
cat columns.txt | awk '{ print $2 }"
node listFiles.js | jq -r .sha1