For most log and text files, simply opening them up in
$editor_of_your_choice works fine. If the file is less than a few hundred megabytes, most modern editors (and even some IDEs) shouldn't choke on them too badly.
But what if you have a 1, 2, or 10 GB logfile or giant text file you need to search through? Finding a line with a bit of text is simple enough (and not too slow) if you're using
grep. But if you want to grab a chunk of the file and edit that chunk, or split the file into smaller files, there's a simple process that I use, based on this Stack Overflow answer: