Find Lines with 80+ Columns in Multiple Files

linux, programming

It’s nice to follow the 80-columns-per-line rule1, but what if you have some lingering project that has yet to conform?

Just go to that project’s sources directory and do


The call to expand is necessary because different people use different widths for tabs. That is, we are trying to find files with 80+ columns (as they appear to humans), not 80+ characters (as they appear to the computer).

  1. See the Linux Kernel Coding Style, “Chapter 2: Breaking long lines and strings”.