Sponsored Content
Top Forums UNIX for Beginners Questions & Answers Grep a sub-string from a string stored in a variable. Post 303036596 by pavan on Thursday 4th of July 2019 06:01:26 AM
Old 07-04-2019
Grep a sub-string from a string stored in a variable.

For example: I am grepping "Hello" from a file and there are 10 matches. So all ten lines with match will get stored into a variable($match). Now I want to ignore those lines which have "Hi" present in that.

Currently I tried this:
Code:
match = grep "Hello" file | grep -v "Hi" file

But that's not working properly

Last edited by Scrutinizer; 07-04-2019 at 07:51 AM..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

how to get the string stored in a variable in a line???

Hi all, I want to search for a data type in a line.For this in a loop i am checking for $DATA_TYPE in a line using grep.But grep is not able to find when i give this. Can any one tell me how to check string in $DATA_TYPE variable in line usign grep (or) any other way to do the above task. ... (4 Replies)
Discussion started by: jisha
4 Replies

2. UNIX for Dummies Questions & Answers

Using GREP to extract variable following a string

Hello, I'm running calculations and I need to extract a specific number from a output file. So far I've only been able to GREP entire lines containing the string: '1 F=' . I would like to go a step further and extract just the number following '1 F='. The entire line looks like: 1 F=... (10 Replies)
Discussion started by: modey3
10 Replies

3. Shell Programming and Scripting

Delete first character from a string stored in a variable

Hallo! Example. #!/bin/bash BACKUP_DIR=/home/userx/backups/evolution echo $BACKUP_DIR # delete the first character from the string BACKUP_DIR=$(echo $BACKUP_DIR | cut -c 2-) echo $BACKUP_DIR It works. It does want I want, delete the first character from string in the... (11 Replies)
Discussion started by: linuxinho
11 Replies

4. 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

5. Shell Programming and Scripting

PERL : pattern matching a string stored in a variable

I have two variables, my $filename = "abc_yyyy_mm_dd.txt"; my $filename1 = " abc_2011_11_07.txt"; I need to perform some operations after checking if $filename has $filename1 in it i have used the below code, if($filename =~ /^$filename1/) { ---- -- } (2 Replies)
Discussion started by: irudayaraj
2 Replies

6. Shell Programming and Scripting

bash: using a string variable in grep

Hi, I've been stuck for several days on this. Using grep on a command line, I can use quotes, eg... grep 'pattern of several words' filename I want to do this in my bash script. In my script I have captured the several command line arguments (eg arg1 arg2) into a variable: variable=$@ I... (2 Replies)
Discussion started by: adrian777uk
2 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. UNIX for Dummies Questions & Answers

How to grep exact string with quotes and variable?

As the title says I'm running a korn script in attempts to find an exact match in named.conf finddomain.ksh #!/bin/ksh # echo "********** named.conf ************" file=/var/named/named.conf for domain in `cat $1` do grep -n '"\$domain "' $file done echo "********** thezah.inc... (1 Reply)
Discussion started by: djzah
1 Replies

9. Shell Programming and Scripting

Grep command to find string in Variable in file2

Hi , I am executing 2 queries and output is saved in file1.txt and file2.txt example of file1.txt Testing word Doc.docx,/Lab/Development and Validation/Multitest/MT_010708/Testing,Development and Validation,root,11-Mar-2014,,,,, Testing Excel _.xlsx,/Lab/Development and... (3 Replies)
Discussion started by: Sunil Mathapati
3 Replies

10. Shell Programming and Scripting

Concat String with variable after a 'grep' and awk

Here is the structure of my file: MyFile.txt g-4.n.g.fr 10.147.243.63 g-4.n.g.fr-w1 Here is my sript: test.sh #! /bin/sh ip=10.147.243.63 worker=$(grep -e $ip $1 | awk '{ print $3; }') echo "" echo $worker echo "" echo $worker echo "" echo "$worker.v.1" echo... (7 Replies)
Discussion started by: chercheur111
7 Replies
MATCH(1L)						      Schily's USER COMMANDS							 MATCH(1L)

NAME
match - searches for patterns in files SYNOPSIS
match [ -option ] pattern [ file ... ] DESCRIPTION
Match searches the named files or standard input (if no filenames are given) for the occurrences of the given pattern on each line. The program accepts literal characters or special pattern matching characters. All lines that match the pattern are output on standard output. You can only specify one pattern string for each match, however, you can construct an arbitrarily complex string. When you do not specify a file, match can be used as a filter to display desired lines. Standard in is used if no files are specified. OPTIONS
-not, -v Prints all lines that do not match. -i Ignore the case of letters -m Force not to use the magic mode -w Search for pattern as a word -x Display only those lines which match exactly -c Display matching count for each file -l Display name of each file which matches -s Be silent indicate match in exit code -h Do not display filenames -n Precede matching lines with line number (with respect to the input file) -b Precede matching lines with block number REGULAR EXPRESSIONS
The following is a table of all the pattern matching characters: c An ordinary character (not one of the special characters discussed below) is a one character regular expression that matches that character. c A backslash () followed by any special character is a one character regular expression that matches the special character itself. The special characters are: ! # % * { } [ ] ? ^ $ ! Logical OR as in match this!that!the_other. You may have to use `{}' for precedence grouping. # A hash mark followed by any regular expression matches any number (including zero) occurrences of the regular expression. ? Matches exactly any one character. W? matches Wa, Wb, Wc, W1, W2, W3 ... * Matches any number of any character. % Matches exactly nothing. It can be used in groups of ored patterns to specify that an empty alternative is possible. {} Curly brackets may be used to enclose patterns to specify a precedence grouping, and may be nested. {%!{test}}version matches the strings testversion and version. [string] A non empty string of characters enclosed in square brackets is a one character regular expression that matches any one character in that string. If however the first character of the string is a circumflex (^), the one character expression matches any character which is not in the string. The ^ has this special meaning only if it occurs first in the string. The minus (-) may be used to indi- cate a range of consecutive ASCII characters; for example, [0-9] is equivalent to any one of the digits. The - loses it's special meaning if it occurs first (after an initial ^, if any) or last in the string. The right square bracket (]) and the backslash () must be quoted with a backslash if you want to use it within the string. ^ Matches the beginning of a line. $ Matches the end of a line. (^*$ matches any entire line) EXAMPLES
FILES
None. SEE ALSO
grep(1), fgrep(1), egrep(1) DIAGNOSTICS
NOTES
Even if a match occurs more than once per line, the line is output only once. Quote special pattern matching characters to prevent them from being expanded by the Command Interpreter. BUGS
The length of the pattern is currently limited to 100 characters. This limit is reduced by 38 if the -w option is used. Joerg Schilling 15. Juli 1988 MATCH(1L)
All times are GMT -4. The time now is 08:13 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy