Regex lookahead for ‘not followed by’ in grep

by

Negative lookahead, which is what you’re after, requires a more powerful tool than the standard grep. You need a PCRE-enabled grep.

If you have GNU grep, the current version supports options -P or --perl-regexp and you can then use the regex you wanted.

If you don’t have (a sufficiently recent version of) GNU grep, then consider getting ack.

More Related Contents:

  1. How to extract all Yahoo emails from a .CSV file?
  2. How to find patterns across multiple lines using grep?
  3. Validating IPv4 addresses with regexp
  4. Regex (grep) for multi-line search needed [duplicate]
  5. How can we match a^n b^n?
  6. How do I grep for all non-ASCII characters?
  7. Negative matching using grep (match lines that do not contain foo)
  8. (grep) Regex to match non-ASCII characters?
  9. Using the star sign in grep
  10. Negative look-ahead in Go regular expressions
  11. Regex Until But Not Including
  12. Regex look behind in VS Code?
  13. Regex to get the words after matching string [duplicate]
  14. Bash, grep between two lines with specified string
  15. How to invert a grep expression
  16. What’s wrong with my lookahead regex in GNU sed?
  17. What does ‘\K’ mean in this regex?
  18. Unix grep regex containing ‘x’ but not containing ‘y’
  19. Does lookbehind work in sed?
  20. Difference between egrep and grep
  21. Using sed and grep/egrep to search and replace
  22. Grep and regex – why am I escaping curly braces?
  23. How to do a non-greedy match in grep?
  24. grep regex whitespace behavior
  25. Understanding positive and negative lookaheads
  26. How to make “grep” read patterns from a file?
  27. What is this pattern “\\s*\\^++\\s*” used for? [duplicate]
  28. Regular expression to enforce complex passwords, matching 3 out of 4 rules
  29. How can I “inverse match” with regex?
  30. .htaccess RewriteRule to path without changing URL

Leave a Comment