CODEWITHSUNDEEP
bashshellgrep
user3411002
user3411002

Reputation: 793

Bash script to search multiple strings in text file

I have created a script to search a string in a text file and outputs all the lines with that string:

    #!/bin/sh
STRING=$1
FILE=dsat.txt
if grep -q $STRING $FILE;
  then
        echo -e "$(grep $STRING $FILE)\n"
else
        echo "Not found"
        exit 0
fi

I want to expand on this where i have multiple details in the text file such as

Word1 Word2 - Word3 Word4 Word5
Word1 Word6 Word3 Word7 Word8

And in the search i search for "Word1 Word3"

I want it to still output these lines as the search case matches this line.

Is this possible using a grep?

Update:

    #!/bin/sh
FILE=text.txt
STRING='$1'

grep "$(sed 's/  */\\|/g' <<<"$1")" $FILE

So when i run the script i do script.sh Word1 Word2 but it seems to not search word2 as well Thanks

Upvotes: 1

Views: 2267

Answers (2)

Mihir Luthra
Mihir Luthra

Reputation: 6759

Till what i understand your question, you mean to say matching multiple patterns?

If that's what you are asking,

grep 'A B\|A B C' file

Would print all lines with either A B or A B C. | is for this pattern | or this pattern. It needs to be backslashed though. For using without backslash you can supply -E flag.

Update:

Let's say you have all the words stored in words,

grep "$(sed 's/  */\\|/g' <<<"$words")" file

Upvotes: 2

Eran Ben-Natan
Eran Ben-Natan

Reputation: 2615

grep -f reads several patterns from file

Upvotes: 0

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