Grep pattern within pattern

Question

cat sudo.txt |tr -d "[:blank:]"|grep '=.*[ALLroot].*/usr/bin/vim'

I want to track below:

=(root)NOPASSWD:/usr/bin/vim
=(ALL)NOPASSWD:/usr/bin/vim
=NOPASSWD:/usr/bin/vim

but not:

=(user)NOPASSWD:/usr/bin/find

It's not more clear. What exactly do you want to remove and why? Because you want only the entries with `ALL` or `root` inside parentheses? — tripleee, Jun 21 '19 at 12:33
Not exactly. Hes grep is searching for one of the letters A, L, r, o, or t, occuring somewhere in front of /usr/bin/vim. — user1934428, Jun 21 '19 at 12:49
Then why are you listing `o` & `L` twice? I think you are either failing to be clear on your intent, failing to understand the consequences of your choices, or very possibly both. Apologies if that sounds combative - sincerely - but if you are here to ask questions, don't deflect answers. Provide *specifics* of why they are inapplicable, and/or consider maybe whether the problem is the underlying paradigm of your design. Maybe what you want is more like `grep -E '\bNOPASSWD:/usr/bin/vim\b'` — Paul Hodges, Jun 21 '19 at 13:14

Toto · Answer 1 · 2019-06-21T13:59:32.130

0

[ALLroot] matches A or L or r or o or t. Use (ALL|root) instead

Given:

cat sudo.txt
=(root)NOPASSWD:/usr/bin/vim
=(ALL)NOPASSWD:/usr/bin/vim
=NOPASSWD:/usr/bin/vim
=(user)NOPASSWD:/usr/bin/find

grep -E '=(\((root|ALL)\))?.*/usr/bin/vim' sudo.txt
=(root)NOPASSWD:/usr/bin/vim
=(ALL)NOPASSWD:/usr/bin/vim
=NOPASSWD:/usr/bin/vim

Explanation:

option -E : extended pattern

=                   # equal sign
(                   # start group
  \(                # opening parenthesis
    (root|ALL)      # root OR ALL
  \)                # closing parenthesis
)?                  # end group, optional
.*                  # 0 or more any character
/usr/bin/vim        # literally

edited Jun 21 '19 at 13:59

answered Jun 21 '19 at 12:04

Toto

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this gives me more than what i want – user973430 Jun 21 '19 at 12:24
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And remove the [useless `cat`](/questions/11710552/useless-use-of-cat) – tripleee Jun 21 '19 at 12:32

score 0 · Answer 2 · answered Jun 21 '19 at 13:17

0

Given the data presented,

grep -E '\bNOPASSWD:/usr/bin/vim\b' sudo.txt

If that doesn't sufficiently select, please show the examples and explain the missing requirements.

answered Jun 21 '19 at 13:17

Paul Hodges

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Grep pattern within pattern

2 Answers2