Need regex for line not starting with hash # Post: 303043035

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Top Forums Shell Programming and Scripting Need regex for line not starting with hash # Post 303043035 by RudiC on Thursday 16th of January 2020 04:34:41 AM

01-16-2020

Registered User

Quote:

Originally Posted by mohtashims

I need to search for lines starting with "Include" and later has string "httpd-ssl.conf"

like the regex should return match for "Include conf/extra/httpd-ssl.conf"
I tried the following:
.
.
.
Below is my current file:
.
.
.
This should not match anything...

Don't worry, your overcomplicated regex doesn't match anything reasonable in your file, if that is what you're after (not clear from your spec). Even uncommented lines with # removed (which I added to your sample file) aren't matched:

Code:

$ grep "^[[:blank:]]*[^[:blank:]#;].+Include.*httpd-ssl.conf" file
$ grep -E "^[[:blank:]]*[^[:blank:]#;].+Include.*httpd-ssl.conf" file
$ sed -n '/^[[:blank:]]*[^[:blank:]#;].+Include.*httpd-ssl.conf/p' file

You could have tried yourself on your "Oracle Linux system", also questioning your online regex tester.

See the detailed, step by step analysis of your regex (culprit seem to be items 3 and 4):

Code:

^[[:blank:]]*[^[:blank:]#;].+Include.*httpd-ssl.conf


^                       # start of line
[[:blank:]]*            # any number of space, TAB, newline
[^[:blank:]#;]          # ONE char non-blank, non-#, non-;
.+                      # ONE or many chars, whichever
Include                 # string constant "Include"
.*                      # any number of any char
httpd-ssl.conf          # string constant

Last edited by RudiC; 01-16-2020 at 05:43 AM..

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