1

In Linux (command line):

I need to find all Perl-files (filename ends with .pl or .pm) that are located in /users/tom/ or any of its sub-directories and which contain both the string ->get( and the string #hyphenate (located in different lines or in the same line). I just need the names of the files (and their path's). I don't need the lines within the file where the strings was found.

Is there a command that can do this?

I know how to find files with one extension:

find /users/tom -name "*.pl"

But i have troubles to find files, that have one of two different extensions. None of this commands works:

find /users/tom -name "*.pl" -name "*.pm"  
find /users/tom -name "*.pl|*.pm"

My workaround is to do it one after the other, but I guess there must be a more elegant way.

Now for the file's content:
I know how to print filenames and matching lines with grep:

grep * -e "->get(" -e "#hyphenate"

This lists all files that contain at least one of the search-strings. But I want a list of files that contain all search-strings.

How can this be done? (Form command-line in Ubuntu/Linux)

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4
  • I don't get it, why can't find /usr/tom | egrep '*.pl| *.pm' work? Commented Nov 14, 2015 at 13:55
  • @Aftnix: Thanks, this is the solution for part 1 of my question. This gives me the list of all files in which I want to search for some strings. How do I perform this search? Commented Nov 14, 2015 at 14:01
  • Not a particularly good solution; a standard wildcard like find -name '*.p[lm]' would work better. Commented Nov 14, 2015 at 17:25
  • TL;DR: grep -ri 'my string' Commented Aug 6, 2020 at 3:39

3 Answers 3

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grep can recursively search directories with -r. To only get file names, not the matching lines, use -l.

grep -rl -- '->get(\|#hyphenate' /users/tom | grep '\.p[lm]$'

Or, with find:

find /users/tom -name '*.p[lm]' -exec grep -l -- '->get(\|#hyphenate' {} +

Update

The above searches for ->get( or #hyphenate, if you want both, you have to run grep twice:

find /users/tom -name '*.p[lm]' -exec grep -l -- '->get(' {} + \
| xargs grep -l '#hyphenate'

If your file names contain whitespace, you might need to specify -Z for the first grep and -0 for xargs.

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3 Comments

This is not a proper solution; it will list files which contain any match, not all the search expressions.
@tripleee: You're right. I missunderstood the question.
@tripleee: should be fixed now.
2

grep -r PLACE_YOUR_STRING_HERE | cut -d ' ' -f 1 | grep '.p1\|.pm'

Replace the string with the pattern you are looking for and then run the command after going to the folder in which you wish to look.

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0 
find /usr/tom | egrep '*.pl| *.pm' | xargs cat | grep <PATTERN>
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2 Comments

A lone * is strictly speaking a regex error, though most greps will simply skip the erroneous part of the expression. The reason ` *` works is accidental, as it will permit zero repetitions of the erroneous space.
Also, as ever, the lone cat is useless; you can add some flags to the final grep to avoid printing the names of matching files; but here, that appears to be the precise opposite of what the OP wants.

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