batch findstr
# EXAMPLE: display the files (within the given folder) that contain the text "+renew"
findstr /n /l "+renew" "C:\Users\LongW\*"
# SYNTAX
# findstr <options-if-any> "<string-to-find>" "<path(s)-to-search>"
# OPTIONS'
# /b Matches the text pattern if it is at the beginning of a line.
# /e Matches the text pattern if it is at the end of a line.
# /l Processes search strings literally.
# /r Processes search strings as regular expressions. This is the default setting.
# /s Searches the current directory and all subdirectories.
# /i Ignores the case of the characters when searching for the string.
# /x Prints lines that match exactly.
# /v Prints only lines that don't contain a match.
# /n Prints the line number of each line that matches.
# /m Prints only the file name if a file contains a match.
# /o Prints character offset before each matching line.
# /p Skips files with non-printable characters.
# https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/findstr