CODEWITHSUNDEEP
bashfilesearchstring
topwoman
topwoman

Reputation: 91

How to search for multiple strings in a file

I want to search for the occurrence of string1 OR string2 OR string3, etc. in a file, and print only those lines (to stdout or a file, either one). How can I easily do this in bash?

Upvotes: 9

Views: 29022

Answers (6)

Muthuraman Elangovan
Muthuraman Elangovan

Reputation: 1

Way:

awk '/Mbits/||/Gbits/{print}' 100P-TCP-f1.out

Upvotes: -1

frankc
frankc

Reputation: 11483

One other choice, especially if the number of strings you want to search is large, is to put those strings into a file delimited by newlines and use:

grep -f file_of_strings file_to_search

Upvotes: 3

dawg
dawg

Reputation: 104102

With Perl:

perl -lne 'print if /string1|string2|string3/;' file1 file2 *.fileext

With Bash one liner:

while read line; do if [[ $line =~ string1|string2 ]]; then echo $line; fi; done < file

With Bash script:

#!/bin/bash

while read line
do
    if [[ $line =~ string1|string2|string3 ]]; then
       echo $line
    fi
done < file

Note that the spaces around "[[ $line =~ string1|string2 ]]" are all relevant. ie these fail in Bash:

[[ $line=~string1|string2 ]] # will be alway true...
[[$line =~ string1|string2]] # syntax error

Upvotes: 1

ghostdog74
ghostdog74

Reputation: 343141

you can also use awk

awk '/string1|string2|string3/' file

With awk, you can also easily use AND logic if needed.

awk '/string1/ && /string2/ && /string3/' file

Upvotes: 18

Randy Proctor
Randy Proctor

Reputation: 7554

Also:

grep -e 'string1' -e 'string2' -e 'string3'

Upvotes: 0

Chen Levy
Chen Levy

Reputation: 16418

grep "string1\|string2\|string3" file_to_search_in

Upvotes: 8

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