How to find files and text in the shell and work with them. #linux #search

gistfile1.sh

# Linux and Cygwin
find /test -name \*.txt -exec sed -i 's/oldValue/newValue/g' {} \;

# OS X. 
# The -i option requires a file extension. Use "" to overwrite the file in place.
find /test -name \*.txt -exec sed -i "" 's/oldValue/newValue/g' {} \;

# Find a string in current directory and subdirectories, excluding some directories.
grep -r --exclude-dir={node_modules,amplify} mystring .