Can grep delete context, but not a full line?

Question

I am removing keys from a config file by the following command:

cat showrunningconfig.txt | grep -v '[ \t\r\n\v\f]*[A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9][A-Fa-f0-9]'

This removes the whole line. But I want to remove only the relevant patterns. grep has the -o option, which shows only the relevant pattern and not the whole line. But the -o option is not working in combination with -v

Any idea? Thanks a lot!

Could you please post sample of input and expected output in your question and let us know for better understanding. — RavinderSingh13
– RavinderSingh13, Commented Feb 26, 2020 at 9:57
Try LC_ALL=C sed -i 's/[[:space:]]*[A-Fa-f0-9]\{8\}//g' showrunningconfig.txt — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Feb 26, 2020 at 10:00

Wiktor Stribiżew · Accepted Answer · 2020-02-26 10:16:38Z

You should use sed when you have a partial pattern to remove from a string.

sed -i 's/[[:space:]]*[[:xdigit:]]\{8\}//g' showrunningconfig.txt

See the online demo

s="Text A1f4E3D4 and more text" sed 's/[[:space:]]*[[:xdigit:]]\{8\}//g' <<< "$s" # => Text and more text

Details

-i - in-place replacement (GNU sed option)
s/[[:space:]]*[[:xdigit:]]\{8\}//g:
- s - substitute command
- [[:space:]]* - 0+ whitespaces
- [[:xdigit:]]\{8\} - eight A-F, a-f and 0-9 chars.

Collectives™ on Stack Overflow

Can grep delete context, but not a full line?

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related