Find words that are 6 characters in length

Question

I have a file.txt

fhadja
ksjfskdasd
adasda
sada
s
adasaaa

I need to extract only the words that are 6 character length from there.

EXAMPLE of what i need to obtain as a result:

fhadja
adasda

Thank you.

Answer 1

You can use:

grep -E '^.{6}$' file
fhadja
adasda

Or using awk:

awk 'length($0)==6' file
fhadja
adasda

Or using sed:

sed -rn '/^.{6}$/p' file
fhadja
adasda

Answer 2

Try this with GNU grep:

grep -E '^.{6}$' file

Output:

fhadja
adasda