How to use grep to filter out lines containing a specific number

Asked Jun 30 '21 at 10:10

Active Jun 30 '21 at 10:13

Viewed 880 times

I want to use grep to filter a txt file. I just want lines containing number 35. I use grep command:

grep -iE "35" File.txt

and I get a result txt which contains many strings like:

9.335837
nal.cpp:3517

These strings contain "35", but that's not what I want. I just want number "35". But strings like:

fd=35
FD:35
ID 35,

are OK too. What grep command will help me do that?

asked Jun 30 '21 at 10:10

Qiang Yao

`grep -iE '\b35\b' File.txt` or `grep -iE '\<35\>' File.txt` – Wiktor Stribiżew Jun 30 '21 at 10:12
Or with GNU grep: `grep -w '35' File.txt`. Take a look at `man grep`. – Cyrus Jun 30 '21 at 10:13

0 Answers0