List lines that consist of a single non-vowel character

Question

I need to list lines that consist of a single non-vowel character.

I got this:

ls | grep -nv '[aeiouy]' file

But this doesn't give me a single character. How do I get just a single character?

why are you piping ls to grep AND giving grep a filename to process? — cas, Mar 06 '16 at 06:33

score 2 · Accepted Answer · edited Apr 13 '17 at 12:36

2

Just add x to match the whole line:

grep -nvx '[aeiou]' file.txt

Or

grep -nv '^[aeiou]$' file.txt

Or

grep -nx '[^aeiou]' file.txt

Or

grep -n '^[^aeiou]$' file.txt

edited Apr 13 '17 at 12:36

Community

answered Mar 06 '16 at 06:12

heemayl

@shawnedward The others should work too..could you please add your input file.. – heemayl Mar 06 '16 at 06:19

1 Answers1