grep lines that contain 1 character followed by another character

by

This will find a “b” that is not followed by “e”:

$ echo "one be
two
bring
brought" | egrep 'b[^e]'

Or if perl is available but egrep is not:

$ echo "one be
two
bring
brought" | perl -ne 'print if /b[^e]/;'

And if you want to find lines with “b” not followed by “e” but no words that contain “be” (using the \w perl metacharacter to catch another character after the b), and avoiding any words that end with b:

$ echo "lab
bribe
two
bring
brought" | perl -ne 'print if /b\w/ && ! /be/'

So the final call would:

$ perl -ne 'print if /b\w/ && ! /be/' f3.txt

More Related Contents:

  1. Looping through the content of a file in Bash
  2. How to permanently set $PATH on Linux/Unix [closed]
  3. How to convert DOS/Windows newline (CRLF) to Unix newline (LF) in a Bash script
  4. Setting an argument with bash [duplicate]
  5. What’s the magic of “-” (a dash) in command-line parameters?
  6. How to generate a core dump in Linux on a segmentation fault?
  7. How to get overall CPU usage (e.g. 57%) on Linux [closed]
  8. Aborting a shell script if any command returns a non-zero value
  9. How to merge two files using AWK? [duplicate]
  10. How to set environment variable for everyone under my linux system?
  11. What is the difference between using `sh` and `source`?
  12. Setting environment variables in Linux using Bash
  13. What does `set -x` do?
  14. Does “argument list too long” restriction apply to shell builtins?
  15. Given two directory trees, how can I find out which files differ by content? [closed]
  16. How to sort a file in-place?
  17. How do I syntax check a Bash script without running it?
  18. Using the passwd command from within a shell script
  19. Is it OK to use the same input file as output of a piped command?
  20. Uppercasing First Letter of Words Using SED
  21. linux: kill background task
  22. When to wrap quotes around a shell variable?
  23. How do you normalize a file path in Bash?
  24. Linux/Unix command to determine if process is running?
  25. How do I get cURL to not show the progress bar?
  26. Using `date` command to get previous, current and next month
  27. Joining multiple fields in text files on Unix
  28. Need to remove the count from the output when using “uniq -c” command
  29. Creating temporary files in bash
  30. How do you run a script on login in *nix?

Leave a Comment