Ubuntu – Grep searching two words in a line

greptext processing

I've been trying to find a way to filter a line that has the word "lemon" and "rice" in it. I know how to find "lemon" or "rice" but not the two of them. They don't need to be next to the other, just one the same line of text.

Best Answer

"Both on the same line" means "'rice' followed by random characters followed by 'lemon' or the other way around".

In regex that is rice.*lemon or lemon.*rice. You can combine that using a |:

grep -E 'rice.*lemon|lemon.*rice' some_file

If you want to use normal regex instead of extended ones (-E) you need a backslash before the |:

grep 'rice.*lemon\|lemon.*rice' some_file

For more words that quickly gets a bit lengthy and it's usually easier to use multiple calls of grep, for example:

grep rice some_file | grep lemon | grep chicken

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Ubuntu – Grep showing file name and string found

You used -l, which is the opposite of what you want. From man grep:

-l, --files-with-matches
      Suppress normal output; instead print the  name  of  each  input
      file  from  which  output would normally have been printed.  The
      scanning will stop on the first  match.   (-l  is  specified  by
      POSIX.)

What you want is -H:

-H, --with-filename
      Print the file name for each match.  This is  the  default  when
      there is more than one file to search.

But that's the default anyway. Just do:

grep -Er 'apple|banana|watermelon' .

(The -E tells grep to act like egrep.)

Ubuntu – How to grep two numbers from the same line at different places using bash

One possible way...

% grep 'solver.cpp:229' ExampleFile.txt | cut -d ' ' -f 3,6 | tr -d ','
2000 0.305721
2020 0.294722

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Ubuntu – Grep showing file name and string found

Ubuntu – How to grep two numbers from the same line at different places using bash

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