How to search all files containing a specific string on Linux and Windows?

• On Linux

  
  grep -rnw 'directory' -e "pattern"
  grep --include=\*.{txt,log} -rnw 'directory' -e "pattern"
  This will only search for files with .txt or .log extension.
  grep --exclude=*.txt -rnw 'directory' -e "pattern"
  This will exclude files with .txt extensions.

• On Windows

  
  CD Location FINDSTR /L /S /I /N /C:"pattern" *.log