How to get string from large txt file?

Question

Text Processing Automation

And with what you can get a line from a large txt file? There is a database like mail:password. There is mail, you need to get its password. How to do this? In general, I look for the presence of the desired line using folderfindtext, but it just says if there are matches and does not get the line from there. I use sublime text to search for a string, but it's very long...

I don't need a text editor like EmEditor or Glogg. I don't need to open the file. I just need to find the desired text in it and return the entire string.

Answer 1

grep _

Answer 2

glogg is exactly what you need
, all the more a trifle, if you already found a forum)