Questions tagged [pcre]

Question 1

I'm stuck with this error without clue or reference how to solve it: I have this list on text.txt Angie Apple Angie Banana Angie Tomato Angie Peach Angie Onion I'm running substitution through ssed (...

Question 2

I have the following journal messages: $ journalctl _COMM=kwin_wayland -o cat --since "-10s" ... kwin_screencast: Dropping a screencast frame because the compositor is slow kwin_screencast: ...

Question 3

I am trying to use lookaround element in PCRE2 regex for Wazuh tool, i need to match strings which are in double quotes and made the below regex however it looks its picking up "<" ...

Question 4

I have many patterns with bracket enclosure, I made a regular expression where is not considering brackets and just only what is inside/between them, but exists a problem when the text within brackets ...

Question 5

The input file exists out of lines containing multiple 10-letter combinations: NGNAEAREAX EAHVSELYCI FNWGNLACQM AWKLRMDHIT PRYMFNYMVM NCNREDEEEQ EAHVSELYCI FNWGNLACQM AWKLRMDHIT PRYMFNYMVM I need a ...

Question 6

Rookie question. Following this answer Move last part of filename to front, I'm trying to do the same, except all files in my case contains square brackets. What I want is to move the title to the ...

Question 7

I have a TOML file in the following format (categories may have any name, the sequential numbering is just an example and not guaranteed): [CATEGORY_1] A=1 B=2 [CATEGORY_2] C=3 D=4 E=5 ... [...

Question 8

Let's say I have a file like following 1,2,3-5,6 1,2,3-5,6, 1 1-3 1,2,3-,4,5-7 1,2,3-,4,5-7, 1,2,-3,4,5 1,2,-,3,4 1,2,,,3,4 ,1,2,3 Only combination of following rules should be considered as valid: ...

Question 9

Using jq, I want to search for a pattern via regex, and wrap the matched string with something like <div> tags $ echo "\"This is a valid json file"\" | jq '. | gsub("...

Question 10

I am trying to do a build and local install of R 4.0.4 on Red Hat Linux 6.8. There were several unmet dependencies which I resolved by doing local installations (following the procedure in this). ...

Question 11

I want to grep nonascii characters from a lot of .gz files. However the below does not work on CentOS 7.6 (GNU grep v2.20) $ zcat yyyy/yyyymmdd/filname.yyyymmdd.gz | grep --color='auto' -P -n "[\...

Question 12

I would like to use a perl compatible regex engine in the less command line utility. Is that possible?

Question 13

Is anyone here can explain a case where the recursive Perl/PCRE regex (?R) can be helpful ? I read https://regular-expressions.mobi/recursebacktrack.html?wlr=1 https://perldoc.perl.org/perlre.html#(%...

Question 14

I am new to GNU/Linux and regex. Recently I've been playing around trying to get to grips with regex. So far I feel I've got a pretty solid foundational understanding. I'm digging PCRE at the moment. ...

Question 15

I have downloaded pcre from https://ftp.pcre.org/pub/pcre/pcre2-10.34.tar.gz and extracted it to /usr/local/lib when I run ./configure --with-included-apr --with-pcre=/usr/local/lib/pcre2-10.34 I ...

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Questions tagged [pcre]

Syntax Error on ssed for Regex Subroutine definitions

In journalctl internal grep, is it possible to specify option to only output matched pattern?

XMLERR: Element '=").*?(?=")</regex' not closed while using lookaround

Is possible to discard outer brackets in regex and consider inner bracket inside?

Find lines with first word containing a certain set of letters

Rename file with the rename tool - moving around square brackets

Extract text starting at specific category header to next category header from a text file

Matching Repeating Pattern Using Regex

How to refer to matched groups in jq gsub?

Local installation of pcre2 not detected while installing R 4.0.4 from source

grep nonascii without pcre

Can I change the regex engine used to search in `less`?

Advanced regex: Can't figure a case where (?R) recursive regex can be used

Help with this non-capturing group with grep?

build apache on linux server

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