Linux Bash: How to find a string inside C/C++ Source and Header Files

Just issue the following in the folder of the source codes and replace ‘FIND ME’ with the string you want to query:

find -O3 . -regex '.*\.\(c\|cpp\|h\)




You can change the contents of the regular expression to search in different file extensions (file types). 


 -exec grep 'FIND ME!' -sl '{}' \;

You can change the contents of the regular expression to search in different file extensions (file types). 

Find all files that contain a string (Get filenames)

Assuming you have a lot of files and you need to find all files that contain a certain string value, you can check them all automatically using the following command. Method 1 - Using find -exec Using the exec flag of find, you can process all files even those that…

27 September 2011

In "Bash"

Grep: Print only the words of the line that matched the regular expression, one per line

grep -oh "\w*$YOUR_PATTERN\w*" * We used the following parameters on our command: -h, --no-filename : Suppress the prefixing of file names on output. This is the default when there is only  one  file  (or only standard input) to search. -o, --only-matching : Print  only  the matched (non-empty) parts of a…

15 April 2016

In "Bash"

How to find lines that contain only lowercase characters

To print all lines that contain only lower case characters, we used the following regular expression in grep: Breakdown of the above regular expression: ^ instructs the regular expression parser that the pattern should always start with the beginning of the line [[:lower:]] this special instruction informs us that only…

17 November 2017

In "Bash"

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