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Full Discussion: Comparing two files and appending only missing lines.
Top Forums Shell Programming and Scripting Comparing two files and appending only missing lines. Post 302185945 by Karthick333031 on Wednesday 16th of April 2008 06:48:02 AM
Old 04-16-2008
Comparing two files and appending only missing lines.
Hi All,
I am a newbie to Shell scripting. Please help me with the Following problem,

1. I have two files with the same name in different locations in the same machine.
Eg: /root/testfolder/a ---- location 1
/tmp/testfolder/a ----- location 2

2. I want to compare the files in location 1 and location 2.
Eg: diff /root/testfolder/a /tmp/testfolder/a
(Please suggest the best way using diff )

3. I must append only the lines missing in location 1(i.e. /root/testfolder/a) without losing any content of location 1.

Eg:
File in location 1Smilie/root/testfolder/a)

Added line in Location 1
This is a test Script
But i am stuck.Please help
This is Added line to LOCATION 1(/root/testfolder/a)

File in location 2Smilie/tmp/testfolder/a)
Added Line in the Location 2 (/tmp/testfolder/a)
This is a test Script
But i am stuck.Please help
This is added line for testing in LOCATION 2(/tmp/testfolder/a)


Executing diff command:

diff /root/testfolder/a /tmp/testfolder/a

Say output of the diff command looks like this:

1c1
< Added line in Location 1 (/root/testfolder/a)
---
> Added Line in the Location 2 (/tmp/testfolder/a)
4c4
< This is Added line to LOCATION 1(/root/testfolder/a)
---
> This is added line for testing in LOCATION 2(/tmp/testfolder/a)

Here,

I am concerned only to append those lines starting with ">" to the correct lines of /root/testfolder/a

Expected result in /root/testfolder/a

Added Line in the Location 2 (/tmp/testfolder/a)
Added line in Location 1
This is a test Script
This is added line for testing in LOCATION 2(/tmp/testfolder/a)
But i am stuck.Please help


Please help me develop a shell script to solve the above posted problem.
Thanks in advance
Karthick.
 

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LEARN ABOUT SUSE

chkstat

CHKSTAT(8)					      Tool to check and set file permissions						CHKSTAT(8)

NAME

       chkstat - Tool to check and set file permissions

SYNOPSIS

       chkstat [--set|-set] [--noheader] [[--examine file ]...]  [[--files filelist ]...]  [[--root directory ]...]  permission-file ...

DESCRIPTION

       The program /usr/bin/chkstat is a tool to check and set file permissions.

       Multiple  permissions  files can be given on the commandline.  If the permission files contain multiple entries for a single file, the last
       entry found will be used.

   General Options
       --set, -set
	      This option enables setting the file permissions, the default is to check and warn only.

       --noheader
	      Omit printing the output header lines.

       --examine file
	      Check permissions for this file and not all files listed in the permissions files.

       --files filelist
	      Check permissions for the files listed in filelist and not for all files listed in the permissions files.

       --root directory
	      Prefix the files given in the permissions files by this directory.

EXAMPLE

       The command

	      chkstat -set /etc/permissions

       will parse the file /etc/permissions and set the access mode and the user- and group memberships each file listed. The format for the input
       file is

       FILEPATH OWNER:GROUP MODE

       and wildcards are not supported for the filepath. Lines starting with '#' and empty lines are treated as comments.

COPYRIGHT

       1996-2003 SuSE Linux AG, Nuernberg, Germany.

       2008 SUSE LINUX Products GmbH

AUTHORS

       Reinhold Sojer, Ruediger Oertel, Michael Schroeder

       Useful changes and additions by Tobias Burnus

3rd Berkeley Distribution					    2008-04-17								CHKSTAT(8)
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