Question

I have a bash script.
I need to look if “text” exists in the file and do something if it exists.

Answer 1

If you need to execute a command on all files containing the text, you can combine grep with xargs. For example, this would remove all files containing “yourtext”:

grep -l "yourtext" * | xargs rm

To search a single file, use if grep ...

if grep -q "yourtext" yourfile ; then
  # Found
fi