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Top Forums Shell Programming and Scripting Help with replace data content Post 302576729 by balajesuri on Saturday 26th of November 2011 01:15:18 AM
Old 11-26-2011
A solution in Perl.

Code:
#! /usr/bin/perl
use warnings;
use strict;

my (@x, @y, $line);
open SOURCE, "< source.txt";
for $line (<SOURCE>) {
    if ($line =~ /^# >/) {
        @x = split /\s+/, $line;
        $x[1] =~ s/>//;
        open DEST, ">> output.txt";
        print DEST "$line";
        close DEST;
        next;
    }
    else {
        @y = split /\t/, $line;
        $y[0] =~ s/$y[0]/$x[1]/;
        open DEST, ">> output.txt";
        print DEST join "\t", @y;
        close DEST;
    }
}
close SOURCE;

source.txt:
------------------
# >length=1
seq program data 909 1992
seq program record 909 1190
# >length=2
seq program data 909 1992
seq program record 909 1190

output.txt:
-------------------
# >length=1
length=1 program data 909 1992
length=1 program record 909 1190
# >length=2
length=2 program data 909 1992
length=2 program record 909 1190
 

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INSTALL(1)							   User Commands							INSTALL(1)

NAME
install - copy files and set attributes SYNOPSIS
install [OPTION]... [-T] SOURCE DEST install [OPTION]... SOURCE... DIRECTORY install [OPTION]... -t DIRECTORY SOURCE... install [OPTION]... -d DIRECTORY... DESCRIPTION
This install program copies files (often just compiled) into destination locations you choose. If you want to download and install a ready-to-use package on a GNU/Linux system, you should instead be using a package manager like yum(1) or apt-get(1). In the first three forms, copy SOURCE to DEST or multiple SOURCE(s) to the existing DIRECTORY, while setting permission modes and owner/group. In the 4th form, create all components of the given DIRECTORY(ies). Mandatory arguments to long options are mandatory for short options too. --backup[=CONTROL] make a backup of each existing destination file -b like --backup but does not accept an argument -c (ignored) -C, --compare compare each pair of source and destination files, and in some cases, do not modify the destination at all -d, --directory treat all arguments as directory names; create all components of the specified directories -D create all leading components of DEST except the last, or all components of --target-directory, then copy SOURCE to DEST -g, --group=GROUP set group ownership, instead of process' current group -m, --mode=MODE set permission mode (as in chmod), instead of rwxr-xr-x -o, --owner=OWNER set ownership (super-user only) -p, --preserve-timestamps apply access/modification times of SOURCE files to corresponding destination files -s, --strip strip symbol tables --strip-program=PROGRAM program used to strip binaries -S, --suffix=SUFFIX override the usual backup suffix -t, --target-directory=DIRECTORY copy all SOURCE arguments into DIRECTORY -T, --no-target-directory treat DEST as a normal file -v, --verbose print the name of each directory as it is created --preserve-context preserve SELinux security context -Z set SELinux security context of destination file and each created directory to default type --context[=CTX] like -Z, or if CTX is specified then set the SELinux or SMACK security context to CTX --help display this help and exit --version output version information and exit The backup suffix is '~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX. The version control method may be selected via the --backup option or through the VERSION_CONTROL environment variable. Here are the values: none, off never make backups (even if --backup is given) numbered, t make numbered backups existing, nil numbered if numbered backups exist, simple otherwise simple, never always make simple backups AUTHOR
Written by David MacKenzie. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report install translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
Full documentation at: <http://www.gnu.org/software/coreutils/install> or available locally via: info '(coreutils) install invocation' GNU coreutils 8.28 January 2018 INSTALL(1)
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