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.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
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
2. Shell Programming and Scripting
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
3. Shell Programming and Scripting
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
4. Shell Programming and Scripting
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
5. Shell Programming and Scripting
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
6. Shell Programming and Scripting
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
7. UNIX for Dummies Questions & Answers
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
8. Shell Programming and Scripting
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
9. Shell Programming and Scripting
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
10. Shell Programming and Scripting
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
LEARN ABOUT FREEBSD
atf-sh
ATF-SH(1) BSD General Commands Manual ATF-SH(1)
NAME
atf-sh [-s shell] -- interpreter for shell-based test programs
SYNOPSIS
atf-sh script
DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library.
atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter-
preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not
use any non-standard extensions.
The following options are available:
-s shell Specifies the shell to use instead of the value provided by ATF_SHELL.
ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes.
ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes.
ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a
specific interpreter.
EXAMPLES
Scripts using atf-sh(3) should start with:
#! /usr/bin/env atf-sh
Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode
the path to atf-sh in the script and then use the -s option afterwards as a single parameter:
#! /path/to/bin/atf-sh -s/bin/bash
ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts.
SEE ALSO
atf-sh(3)
BSD
September 27, 2014 BSD