Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: egrep -w command by reading from file
Top Forums Shell Programming and Scripting egrep -w command by reading from file Post 302561366 by Franklin52 on Tuesday 4th of October 2011 02:37:53 AM
Old 10-04-2011
Quote:
Originally Posted by senayasma
Yes, this command worked. Could you please explain the details of 'NR==FNR{a[$0];next}$1 in a' ?

Thanks in advance,
Sure.
Code:
awk 'NR==FNR{a[$0];next}$1 in a' file1.txt file2.txt > output.txt

Explanation:

NR==FNRcondition is true when we read the first file
{a[$0];next}Define array a with the line of the first file as index
$1 in aprint the line of the second file if the first field is an index of arrary a.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

egrep command

I'd like to grep a pattern of a version number as *_number.number.number number should be digit my grep is |egrep '^*++\.+' It works for V_3.2.1 or V _5.3.2 but not with V_43.6.543 !!!!! How can I specify any repetition of digit in the ? thanks, (4 Replies)
Discussion started by: annelisa
4 Replies

2. Shell Programming and Scripting

Help with egrep command

Hi All, I am using egrep command to search one pattern. Following is the command i am using egrep -i "ACL*" filename but its also giving me the records which do not contain ACL. any help would be appreciated. Regards, Sam (3 Replies)
Discussion started by: sam25
3 Replies

3. Shell Programming and Scripting

Query regarding egrep command

Hi All, I am having a query regarding the usage of egrep command. i am having two unix environmanets in environment when i am using "egrep -f" it is working fine and other unix environment i am getting a syntax error. Please let me know if i need to set any environmane variables. ... (12 Replies)
Discussion started by: Sriram.Vedula53
12 Replies

4. Shell Programming and Scripting

egrep command and order

Hi All, Here is my question. I have two files, file1.txt and file2.txt. I need the line number (index number) of file2.txt where the words in file1.txt appear. But they have to be in the same order as file1.txt. In example, file1.txt Z K A ... T file2.txt W A Q R (6 Replies)
Discussion started by: senayasma
6 Replies

5. Shell Programming and Scripting

Help with egrep command

cat /tmp/inventory.csv|grep AARP|egrep -v "T11|12.4\(7\)" how do i exclude in addition to above 12.4\(3\) I have tried adding this in i.e -v "T11|12.4\(7\)|12.4\(3\)" but it did not work (3 Replies)
Discussion started by: slashbash
3 Replies

6. Shell Programming and Scripting

Help with egrep command

Hello folks, Here's how my current egrep command works: egrep "NY|DC|LA|VA|MD" state_data.txt I am planning to use a file to enter all allowable state values like say a new state_names.lookup with the following data: NY DC LA VA MD egrep "`cat state_names.lookup`"... (6 Replies)
Discussion started by: calredd
6 Replies

7. Shell Programming and Scripting

help in egrep command in file

Hi Guys, I need hepl on egrep commnad I have one file and i need grep only specific lines.. EX: 2012-04-01 02:15:14 w 2012-04-01 02:15:14 w 2012-04-01 02:15:14 w 2012-10-26 02:15:14 w 2012-04-01 02:15:14 w 2012-10-26 02:15:14 w 2012-10-26 02:15:14 w 2012-10-26 03:18:56 M... (1 Reply)
Discussion started by: asavaliya
1 Replies

8. Shell Programming and Scripting

SendEmail - Script reading database file with sleep command

Hello, I would like to send email message to my mail list. I have been running linux based server and I submitted this process manually up to now. I would like to send each individual with a shell script. In ssh panel, I tested below command and it works smoothly. sendEmail -t... (1 Reply)
Discussion started by: baris35
1 Replies

9. UNIX for Beginners Questions & Answers

Egrep command is not working for me

my file is below REREGISTER is something to Failed to create the request Failed to create the request in not easy I know how REREGISTERcommand i run is egrep 'REREGISTER|Failed|to|create|the|request' test1 expected output REREGISTER is something to Failed to create the request i should... (2 Replies)
Discussion started by: mirwasim
2 Replies

10. Shell Programming and Scripting

Reading from file bash command

Hello, I have a file in the following format id sample platform R1 R2 gene1 gene2 gene3 1 abc llumina R1_001.fastq.gz R2_001.fastq.gz apoe prnpp asp 2 def llumina R1_001.fastq.gz R2_001.fastq.gz apoe prnpp 3 ghi llumina ... (3 Replies)
Discussion started by: nans
3 Replies

LEARN ABOUT SUSE

lzcmp

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)
All times are GMT -4. The time now is 07:00 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy