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Top Forums Shell Programming and Scripting Check if a string exists in a file Post 302950322 by kraljic on Thursday 23rd of July 2015 11:52:16 AM
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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unix2dos(1)						      General Commands Manual						       unix2dos(1)

NAME
unix2dos - UNIX to DOS text file format converter SYNOPSYS
unix2dos [options] [-c convmode] [-o file ...] [-n infile outfile ...] Options: [-hkqV] [--help] [--keepdate] [--quiet] [--version] DESCRIPTION
This manual page documents unix2dos, the program that converts text files in UNIX format to DOS format. OPTIONS
The following options are available: -h --help Print online help. -k --keepdate Keep the date stamp of output file same as input file. -q --quiet Quiet mode. Suppress all warning and messages. -V --version Prints version information. -c --convmode convmode Sets conversion mode. Simulates unix2dos under SunOS. -o --oldfile file ... Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used. -n --newfile infile outfile ... New file mode. Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be used or you WILL lost your files. EXAMPLES
Get input from stdin and write output to stdout. unix2dos Convert and replace a.txt. Convert and replace b.txt. unix2dos a.txt b.txt unix2dos -o a.txt b.txt Convert and replace a.txt in ASCII conversion mode. Convert and replace b.txt in ISO conversion mode. unix2dos a.txt -c iso b.txt unix2dos -c ascii a.txt -c iso b.txt Convert and replace a.txt while keeping original date stamp. unix2dos -k a.txt unix2dos -k -o a.txt Convert a.txt and write to e.txt. unix2dos -n a.txt e.txt Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt. unix2dos -k -n a.txt e.txt Convert and replace a.txt. Convert b.txt and write to e.txt. unix2dos a.txt -n b.txt e.txt unix2dos -o a.txt -n b.txt e.txt Convert c.txt and write to e.txt. Convert and replace a.txt. Convert and replace b.txt. Convert d.txt and write to f.txt. unix2dos -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt DIAGNOSTICS
BUGS
The program does not work properly under MSDOS in stdio processing mode. If you know why is that so, please tell me. AUTHOR
Benjamin Lin - ( blin@socs.uts.edu.au ) MISCELLANY
Tested environment: Linux 1.2.0 with GNU C 2.5.8 SunOS 4.1.3 with GNU C 2.6.3 MS-DOS 6.20 with Borland C++ 4.02 Suggestions and bug reports are welcome. SEE ALSO
dos2unix(1) 1995.03.31 unix2dos v2.2 unix2dos(1)
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