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Top Forums Shell Programming and Scripting Need to replace one string, in a file, with another string from a different file ... Post 302352786 by Praveen_218 on Sunday 13th of September 2009 10:56:25 AM
Old 09-13-2009
Quote:
Originally Posted by ripat
Code:
awk -F: -v OFS=":" 'NR==FNR{_[$1]=$2;next}_[$1]{$2=_[$1]}1' shadow2 shadow1

This worked great for my requirements, Thanks Ripet.

---------- Post updated at 08:26 PM ---------- Previous update was at 08:21 PM ----------

Quote:
Originally Posted by know d unknown
thx for pointing out ripat...
the following code will work fine:

awk -F":" 'NR==FNR{a[$1]=$0; next} NR!=FNR{if(a[$1])print a[$1]; else print $0}' shadow2 shadow1
David:$1$FbP0lc8N$MIJ8outnkYyBedIYK7TJ6.:14500:0:90:7:::
sarvani:$1$0wPwj2dB$GSHkbM9kcPZkGPTdKfZJP1:14293:0:90:7:::
stuart:$1$sPgpLdir$b9qcdXKeJ78zaZ2tpJuuA/:13924:0:90:7:::

check if this works fine
I'm very much thankful to you known_d_unknown for your quick replies; it's outstanding and I really appreciate it. Thanks its working for me now.

Last edited by Praveen_218; 09-13-2009 at 12:05 PM..
 

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REPLACE(1)						       MySQL Database System							REPLACE(1)

NAME
replace - a string-replacement utility SYNOPSIS
replace arguments DESCRIPTION
The replace utility program changes strings in place in files or on the standard input. Invoke replace in one of the following ways: shell> replace from to [from to] ... -- file_name [file_name] ... shell> replace from to [from to] ... < file_name from represents a string to look for and to represents its replacement. There can be one or more pairs of strings. Use the -- option to indicate where the string-replacement list ends and the file names begin. In this case, any file named on the command line is modified in place, so you may want to make a copy of the original before converting it. replace prints a message indicating which of the input files it actually modifies. If the -- option is not given, replace reads the standard input and writes to the standard output. replace uses a finite state machine to match longer strings first. It can be used to swap strings. For example, the following command swaps a and b in the given files, file1 and file2: shell> replace a b b a -- file1 file2 ... The replace program is used by msql2mysql. See msql2mysql(1). replace supports the following options. o -?, -I Display a help message and exit. o -#debug_options Enable debugging. o -s Silent mode. Print less information what the program does. o -v Verbose mode. Print more information about what the program does. o -V Display version information and exit. COPYRIGHT
Copyright (C) 1997, 2014, Oracle and/or its affiliates. All rights reserved. This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/. SEE ALSO
For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/. AUTHOR
Oracle Corporation (http://dev.mysql.com/). MySQL 5.5 01/30/2014 REPLACE(1)
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