Show lines that do not match a pattern.
Section: grep, egrep, and ripgrep
Invert match
bash
bash
grep -RInv '^\s*(#|$)' ./configExplanation
Useful for skipping comments and blank lines.
Learn the surrounding workflow
Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.
Related commands
Same sheet · prioritizing grep, egrep, and ripgrep
ripgrep with PCRE2
Use lookbehind or advanced features through PCRE2 mode.
sed regex replacement
Replace all runs of whitespace with a single space.