Select only words with a letter
 

Hi,

Can I select only words with the letter "a" for example? On a file txt.

example:

cat expre.txt | grep........

regards

Grep will give you the entire line if it encounters a match.

Do you just want the specific word only that has an "a" in it?

yeap,

I only want words with letters "a".

I know than the documentos only has words with letters "a" and "b".

The document is similar to:

aaa
abbabba
aaaabba
aba
aab
bba
baab
..
..
..
..

Umm if you mean there are only words that consist of either a, b or both of them, and you want to print lines with only 'a's (which means: you don't want to print lines that have 'b's in them)? In that case:

Actually I'm not sure if "b" or "file.txt" comes first; I always forget it. Well, try and see :)

EDIT: the above works if there's one word per one line. If there are multiple, it will not work.

PERFECT!!!!!!!!!!!


I have to use the next command:

cat [name_fichero] | grep -v b

It's perfect