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  1. unix.stackexchange.com › questions › 25821Grep: how to add an "OR" condition? - Unix & Linux Stack Exchange

    1 gru 2011 · You don't need regexes if you just want to grep for different fixed patterns. Just use the -e parameter for each pattern you want to match, or one -F if you want to supply them as a newline separated list, or -f if you want to read them from a file (see man grep). –

  2. linuxtect.com › grep-or-condition-tutorialGrep “OR” Condition Tutorial - LinuxTect

    25 mar 2022 · The grep command OR condition can be enabled with the -E option like below. grep -E "PATTERN1|PATTERN2|PATTERN3" FILE. PATTERN1,PATTERN2 and PATTERN3 are the search terms or patterns we want to match. -E option is used to make search term with OR condition. | character is used for OR condition.

  3. linuxier.com › how-to-use-grep-or-conditionHow to Use grep OR Condition [7 Best Ways] - linuxier.com

    24 lip 2024 · Learn how to use the grep OR condition to search multiple patterns in files efficiently. Discover commands, examples, and best practices for effective searches.

  4. www.shellhacks.com › grep-or-grep-and-grep-not-match-multiple-patternsGrep OR – Grep AND – Grep NOT – Match Multiple Patterns

    27 gru 2016 · From the following article you’ll learn how to match multiple patterns with the OR, AND, NOT operators, using grep, egrep, sed and awk commands from the Linux command line.

  5. unix.stackexchange.com › questions › 55359regular expression - How to run grep with multiple AND patterns?...

    25 mar 2016 · grep -X '.*pattern1.*&.*pattern2.*'. (adding .* s as <x>&<y> matches strings that match both <x> and <y>exactly, a&b would never match as there's no such string that can be both a and b at the same time). If the patterns don't overlap, you may also be able to do: grep -e 'pattern1.*pattern2' -e 'pattern2.*pattern1'.

  6. unix.stackexchange.com › questions › 82990How can I grep for this or that (2 things) in a file?

    You need to put the expression in quotation marks. The error you are receiving is a result of bash interpretting the (as a special character. Also, you need to tell grep to use extended regular expressions. $ grep -E '(then|there)' x.x Without extended regular expressions, you have to escape the |, (, and ). Note that we use single quotation ...

  7. sysadminsage.com › grep-with-or-conditionMaster The Grep Command With Or Condition | Expert Tips

    25 mar 2024 · Adding Or Condition to Grep. When using the “or” condition in Grep, you can combine it with other options to further customize your search. For example, you can use the “-i” option to perform a case-insensitive search or the “-r” option to search recursively in directories.

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