File files utility on UNIX

find.sh

#!/bin/sh

#GREP for gz
find /path/to/folder -name '*.log.gz' -print0 | xargs -0 zgrep "STRING"
#GREP for log
find /path/to/folder -name '*.log' -print0 | xargs -0 grep "STRING"
#GREP regex
tail -f /path/to/something.log | egrep "Exception|\[WARN|\[ERROR"
#find files with file name pattern and content and print all matched file content.
find /path/to/folder -name '*.txt' -print0 | xargs -0 grep "STRING" -l | xargs cat && echo