grep

Look for a string of text within several files in a folder

grep -nr '<string>' <path>

Where:

• -n: show the line number of the match
• -r: recurse into sub-directories
• '<string>' looks for instances of <string> in your files
  • there is additional matching control and regular expressions you can use to fine-tune this
• <path>: looks at the files in this directory and all sub-directories

Example:

grep -nr 'foobar' my-project/lib/

my-project/lib/file_one.txt:17:There is a foobar in here
my-project/lib/nested/folder/file_two.txt:42:I found a foober here too

• Credit: https://stackoverflow.com/a/4121821
• Grep manual: https://www.gnu.org/software/grep/manual/grep.html

See also

• ripgrep