Task: Count the total number of lines in all "*.gz" files in the /testbed directory tree after decompression
Command: find /testbed -type f -name '*.gz' | xargs zcat | wc -l
Equivalent command: find /testbed -type f -name "*.gz" -exec sh -c 'gunzip -c "$0" | wc -l' {} \; | awk '{s+=$1} END {print s}'