Check if a string exists in a file


 
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Old 07-23-2015
Check if a string exists in a file

bash in RHEL 6.3

I have these 2 files with strings.

Code:
$ cat someStrings.txt
LOGICAL1
HUNGARY2
PENGUIN2
MOBILE
GUITAR1
MOUSE1
$

Code:
$ cat checkIF.txt
PENGUIN
MOBILE
$

I need to search for strings in someStrings.txt file that matches the patterns in checkIF.txt file.
The strings in someStrings.txt sometimes end with a number . But, during pattern match, this number should be ignored.
If there is at least 1 match, just print PENGUIN exists in someStrings.txt file.

Logic will look like

Code:
if
grep -c PENGUIN someStrings.txt > 0
then print 'PENGUIN exists in someStrings.txt file'
then proceed with pattern search in the file
fi

So, with the sample data given above, my expected output will be

PENGUIN exists in someStrings.txt file ( PENGUIN2 exists in someStrings.txt file is fine too )
MOBILE exists in someStrings.txt file

Any idea how I could do this ?
 
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