How to get lines that contain string in a file?

Question

In Linux, How do I display lines that contain a string in a text file, such as:

search "my string"  file_name

How do I make the search case sensitive/insensitive? And how do I also display the line numbers?

Regards

score 23 · Accepted Answer · edited Jul 22 '12 at 15:08

23

well

grep -n "my string" file_name

will do for your particular query. GREP is by default case sensitive in nature and to make it case insensitive you can add -i option to it. The -n option displays the line numbers. For other myriad options, I recommend

man grep

for more interesting pattern matching capability of GREP.

edited Jul 22 '12 at 15:08

HeatfanJohn

366
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answered Jul 22 '12 at 14:50

kaji

2,510
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17

score -1 · Answer 2 · edited Mar 29 '18 at 11:18

-1

#!/bin/bash
cd $HOME/Desktop
s=xda
m=$(grep -n "$s" $HOME/Desktop/tt.txt )
if [ "$m" = "$s" ] ;then
    echo "success"
else
  echo "fail"
fi

edited Mar 29 '18 at 11:18

Alexander Tolkachev

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23

answered Mar 29 '18 at 09:41

Raj s

1

1

Looks like this is wrong answer. – Alexander Tolkachev Mar 29 '18 at 11:19
1

Also, single letter variable names are bad. This code snippet would be much more readable with better naming. – chicks Mar 29 '18 at 16:39

How to get lines that contain string in a file?

2 Answers2