Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Block of records to select from a file

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Block of records to select from a file
# 1  
Old 04-20-2011
Block of records to select from a file
Hello:

I am new to shell script programming. Now I would like to select specific records block from a file. For example, current file "xyz.txt" is containing 1million records and want to select the block of records from line number 50000 to 100000 and save into a file. Can anyone suggest me how do I write a command in one line?

Thank you.
# 2  
Old 04-20-2011
Try this

Code:
sed -n '50000,100000 p' file

#sed -n "<startline>,<endline> p" file

regards,
Ahamed
# 3  
Old 04-20-2011
Try this
Code:
perl -ne 'print if $. >= 50000; exit if $. >= 100000;' xyz.txt>output_file

# 4  
Old 04-20-2011
Code:
#!/bin/bash
# bash 4 tested
declare -i num=0
while read -r line
do
    ((num++))
    if (( $num >50000 ));then
        echo "$line"
    fi
    if (( $num == 100001 ));then
        exit
    fi

done <file > output

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Quick way to select many records from a large file

I have a file, named records.txt, containing large number of records, around 0.5 million records in format below: 28433005 1 1 3 2 2 2 2 2 2 2 2 2 2 2 28433004 0 2 3 2 2 2 2 2 2 1 2 2 2 2 ... Another file is a key file, named key.txt, which is the list of some numbers in the first column of... (5 Replies)
Discussion started by: zenongz
5 Replies

2. Shell Programming and Scripting

Select records and fields

Hi All I would like to modify a file like this: >antax gioq21 tris notes abcdefghij klmnopqrs >betax gion32 ter notes2 tuvzabcdef ahgskslsooin this: >tris abcdefghij klmnopqrs >ter tuvzabcdef ahgskslsoo So, I would like to remove the first two fields(and output field 3) in record... (4 Replies)
Discussion started by: giuliangiuseppe
4 Replies

3. Shell Programming and Scripting

To select non-duplicate records using awk

Friends, I have data sorted on id like this id addressl 1 abc 2 abc 2 abc 2 abc 3 aabc 4 abc 4 abc I want to pick all ids with addressesses leaving out duplicate records. Desired output would be id address 1 abc 2 abc 3 abc 4 abc (5 Replies)
Discussion started by: paresh n doshi
5 Replies

4. UNIX for Dummies Questions & Answers

Turning to SED to select specific records

Hi All, I am looking for a simple concise solution most likely using sed to process the following 4 rows of data from the same record and only keeps it if the second record satisfy certain critea such as surname matches up to smith or jackson: John (firstname) Smith (surname) ... (21 Replies)
Discussion started by: gjackson123
21 Replies

5. Shell Programming and Scripting

awk print only select records from file2

Print only records from file 2 that do not match file 1 based on criteria of comparing column 1 and column 6 Was trying to play around with following code I found on other threads but not too successful Code: awk 'NR==FNR{p=$1;$1=x;A=$0;next}{$2=$2(A?A:",,,")}1' FS=~ OFS=~ file1 FS="*"... (11 Replies)
Discussion started by: sigh2010
11 Replies

6. Shell Programming and Scripting

Automatically select records from several files and then run a C executable file inside the script

Dear list its my first post and i would like to greet everyone What i would like to do is select records 7 and 11 from each files in a folder then run an executable inside the script for the selected parameters. The file format is something like this 7 100 200 7 100 250 7 100 300 ... (1 Reply)
Discussion started by: Gtolis
1 Replies

7. Shell Programming and Scripting

select records from one file based on a second file

Hi all: I have two files: file1: 74 DS 9871 199009871 1 1990 4 1 165200 Sc pr de te sa ox 1.0 1.0 13.0000 35.7560 5.950 3.0 3.0 13.0100 35.7550 5.970 ** 74 DS 99004 74DS99004 6738 1990 4 1 165200 Eb pr de te sa ox 1.0 1.0 13.0000 ... (7 Replies)
Discussion started by: rleal
7 Replies

8. Shell Programming and Scripting

Using a variable to select records with awk

As part of a bigger task, I had to read thru a file and separate records into various batches based on a field. Specifically, separate records based on the value in the batch field as defined below. The batch field left-justified numbers. The datafile is here > cat infile 12345 1 John Smith ... (5 Replies)
Discussion started by: joeyg
5 Replies

9. Shell Programming and Scripting

Select last block from a file

Hi, I have to always select last portion of a block identified by 2 fixed keywords which repeats in a file for eg START .... ... END START .... ... END START .... ... END (9 Replies)
Discussion started by: misenkiser
9 Replies

10. UNIX for Dummies Questions & Answers

Select records based on search criteria on first column

Hi All, I need to select only those records having a non zero record in the first column of a comma delimited file. Suppose my input file is having data like: "0","01/08/2005 07:11:15",1,1,"Created",,"01/08/2005" "0","01/08/2005 07:12:40",1,1,"Created",,"01/08/2005"... (2 Replies)
Discussion started by: shashi_kiran_v
2 Replies
Login or Register to Ask a Question