CODEWITHSUNDEEP
regexunixgreppattern-matching
SreeVik
SreeVik

Reputation: 73

Grepping for whole words containing only numbers

I am trying to grep lines that contain words consisting in just digits.

So given a sample file like this:

abcd
abcd 123
adef1234

I am looking to output the line abcd 123 and assign it to a variable. I tried the below:

grep -w '^[0-9]$' test_file.txt

But its not working. Can anyone please help me out?

Upvotes: 1

Views: 2420

Answers (1)

max taldykin
max taldykin

Reputation: 12908

In grep ^ and $ match start and end of line even if there is -w flag enabled. And you need to enable extended regexps (-E flag) to use +. Try

grep -E -w '[0-9]+' test_file.txt

Upvotes: 3

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