Demonstrates techniques for using awk to process files.
This example was created for creating for breaking multi container pod images listed on a single line of output into multiple lines.
# lines of 2 and 3 items
cat example1.txt | awk '{print $1,$2}'
cat example1.txt | awk '{print $1,$2,$3}'
# if a line of three items split onto 2 lines.
cat example1.txt | awk '{if(!$3) {print $1,$2} else {print $1,$3;print $1,$2}}'# prepending text to output
cat example1.txt | awk '{print "stdout:" $0;}'# extracting a specific field
mkdir -p ./out
cat ./jq_libs.txt | awk 'NF == 4 { {print $3} }' > ./out/jq_libs_extracted.txt
# get unique paths
cat ./out/jq_libs_extracted.txt | awk -F/ -vOFS=/ '{ print $1,$2,$3,$4; }' | sort -ucheatsheet awk