Sponsored Content
Top Forums Shell Programming and Scripting Grep: check if a string comes up twice Post 302999171 by tons92 on Wednesday 14th of June 2017 04:45:08 PM
Old 06-14-2017
Grep: check if a string comes up twice

I have the following files
list.txt
Code:
string1<TAB>ABC
string2<TAB>DEF
string3<TAB>GHI

query.txt
Code:
ABC
DEF
GHI
ABC

Now I want to check, if a string in the first column of list.txt is twice in query.txt

so my command is:
Code:
while IFS=$'\t' read k v ; do  if (($(grep -i '$v' query.txt | wc -l)>=2)); then echo "$v more than 2"; fi; done<list.txt

but nothing is returned here, so where is the error?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

read string, check string length and cut

Hello All, Plz help me with: I have a csv file with data separated by ',' and optionally enclosed by "". I want to check each of these values to see if they exceed the specified string length, and if they do I want to cut just that value to the max length allowed and keep the csv format as it... (9 Replies)
Discussion started by: ozzy80
9 Replies

2. UNIX for Dummies Questions & Answers

| help | unix | grep - Can I use grep to return a string with exactly n matches?

Hello, I looking to use grep to return a string with exactly n matches. I'm building off this: ls -aLl /bin | grep '^.\{9\}x' | tr -s ' ' -rwxr-xr-x 1 root root 632816 Nov 25 2008 vi -rwxr-xr-x 1 root root 632816 Nov 25 2008 view -rwxr-xr-x 1 root root 16008 May 25 2008... (7 Replies)
Discussion started by: MykC
7 Replies

3. Shell Programming and Scripting

Grep for a string and then grep using a string from that result

Hello, Thanks in advance for the query. There is a log file abcd.log which has multible line like this. "hello1" , "hello2", "hello3" , "hello4" , "hello5" I want to grep for the lines which has "hello4" & "hello5" and use "hello2" to grep the same log file again. All these should... (8 Replies)
Discussion started by: kzenthil
8 Replies

4. Shell Programming and Scripting

grep on string and printing line after until another string has been found

Hello Everyone, I just started scripting this week. I have no background in programming or scripting. I'm working on a script to grep for a variable in a log file Heres what the log file looks like. The x's are all random clutter xxxxxxxxxxxxxxxxxxxxx START: xxxxxxxxxxxx... (7 Replies)
Discussion started by: rxc23816
7 Replies

5. Shell Programming and Scripting

Grep a string and write a value to next line of found string

Hi, I have two variables x and y. i need to find a particular string in a file, a workflow name and then insert the values of x and y into the next lines of the workflow name. basically it is like as below wf_xxxxxx $$a= $$b= $$c= figo $$d=bentley i need to grep the 'wf_xxxx' and then... (6 Replies)
Discussion started by: angel12345
6 Replies

6. Shell Programming and Scripting

Grep a string from input file and delete next three lines including the line contains string in xml

Hi, 1_strings file contains $ cat 1_strings /home/$USER/Src /home/Valid /home/Review$ cat myxml <projected value="some string" path="/home/$USER/Src"> <input 1/> <estimate value/> <somestring/> </projected> <few more lines > <projected value="some string" path="/home/$USER/check">... (4 Replies)
Discussion started by: greet_sed
4 Replies

7. Shell Programming and Scripting

grep exact string from files and write to filename when string present in file

I am attempting to grep an exact string from a series of files within a directory and append that output to the filename when it is present in the file. I've been after this all day with no luck. Thanks for your help in advance :wall:. (4 Replies)
Discussion started by: JC_1
4 Replies

8. Shell Programming and Scripting

Check file for string existence before appending it with string

I want to append file with a string but before doing that i want to check if this string already exist in that file.I tried with grep on Solaris 10 but unsuccessful.Man pages from grep seems to suggest if the string is found command status will be 0 and if not 1.But i am not finding it.May be i... (2 Replies)
Discussion started by: sahil_shine
2 Replies

9. Shell Programming and Scripting

Grep string in files and list file names that contain the string

Hi, I have a list of zipped files. I want to grep for a string in all files and get a list of file names that contain the string. But without unzipping them before that, more like using something like gzcat. My OS is: SunOS test 5.10 Generic_142900-13 sun4u sparc SUNW,SPARC-Enterprise (8 Replies)
Discussion started by: apenkov
8 Replies

10. Shell Programming and Scripting

Grep a string and count following lines starting with another string

I have a large dataset with following structure; C 0001 Carbon D SAR001 methane D SAR002 ethane D SAR003 propane D SAR004 butane D SAR005 pentane C 0002 Hydrogen C 0003 Nitrogen C 0004 Oxygen D SAR011 ozone D SAR012 super oxide C 0005 Sulphur D SAR013... (3 Replies)
Discussion started by: Syeda Sumayya
3 Replies
SVK::Log::Filter::Grep(3)				User Contributed Perl Documentation				 SVK::Log::Filter::Grep(3)

SYNOPSIS
SVK::Log::Filter::Grep - search log messages for a given pattern DESCRIPTION
The Grep filter requires a single Perl pattern (regular expression) as its argument. The pattern is then applied to the svn:log property of each revision it receives. If the pattern matches, the revision is allowed to continue down the pipeline. If the pattern fails to match, the pipeline immediately skips to the next revision. The pattern is applied with the /i modifier (case insensitivity). If you want case-sensitivity or other modifications to the behavior of your pattern, you must use the "(?imsx-imsx)" extended pattern (see "perldoc perlre" for details). For example, to search for log messages that match exactly the characters "foo" you might use svk log --filter "grep (?-i)foo" However, to search for "foo" without regards for case, one might try svk log --filter "grep foo" The result of any capturing parentheses inside the pattern are not available. If demand dictates, the Grep filter could be modified to place the captured value somewhere in the stash for other filters to access. If the pattern contains a pipe character ('|'), it must be escaped by preceding it with a '' character. Otherwise, the portion of the pattern after the pipe character is interpreted as the name of a log filter. STASH
/PROPERTY MODIFICATIONS Grep leaves all properties and the stash intact. perl v5.10.0 2008-08-04 SVK::Log::Filter::Grep(3)
All times are GMT -4. The time now is 08:16 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy