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Top Forums Shell Programming and Scripting Replacing the existing files only Post 302512904 by shruthidwh on Monday 11th of April 2011 09:48:04 PM
Old 04-11-2011
Replacing the existing files only

Hey,

Can someone pls give me an idea on how to write a shell script for the below requirement.

I am generating lot of .txt files in a unix directory through a etl tool, now I need to write a shell script which will move these files to another directory(\abc\xyz\source), but in the \abc\xyz\source same file may exsit , if the file with the same name is exsiting then I need to remove the exsiting file file and replace those files with the newly created file from the ETL tool.

Example:- In my source dir I have the below files.
1.txt
2.txt
3.txt

and in the target directory I have

4.txt
5.txt
3.txt
1.txt

Now I want the shell script to move all the files from source dir and replace the files in the target directory, this replace should happen for only those files which are exsiting in the source dir.so my output should be as below.

1.txt
2.txt -- this should be replaced, i.e existing file should be removed and new file should be placed here.
3.txt -- this should be replaced, i.e existing file should be removed and new file should be placed here.
4.txt
5.txt

Thx,
Shruthi
 

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DH_INSTALLDEB(1)						     Debhelper							  DH_INSTALLDEB(1)

NAME
dh_installdeb - install files into the DEBIAN directory SYNOPSIS
dh_installdeb [debhelperoptions] DESCRIPTION
dh_installdeb is a debhelper program that is responsible for installing files into the DEBIAN directories in package build directories with the correct permissions. FILES
package.postinst package.preinst package.postrm package.prerm These maintainer scripts are installed into the DEBIAN directory. Inside the scripts, the token #DEBHELPER# is replaced with shell script snippets generated by other debhelper commands. package.triggers package.shlibs These control files are installed into the DEBIAN directory. Note that package.shlibs is only installed in compat level 9 and earlier. In compat 10, please use dh_makeshlibs(1). package.conffiles This control file will be installed into the DEBIAN directory. In v3 compatibility mode and higher, all files in the etc/ directory in a package will automatically be flagged as conffiles by this program, so there is no need to list them manually here. package.maintscript Lines in this file correspond to dpkg-maintscript-helper(1) commands and parameters. However, the "maint-script-parameters" should not be included as debhelper will add those automatically. Example: # Correct rm_conffile /etc/obsolete.conf 0.2~ foo # INCORRECT rm_conffile /etc/obsolete.conf 0.2~ foo -- "$@" In compat 10 or later, any shell metacharacters will be escaped, so arbitrary shell code cannot be inserted here. For example, a line such as "mv_conffile /etc/oldconffile /etc/newconffile" will insert maintainer script snippets into all maintainer scripts sufficient to move that conffile. It was also the intention to escape shell metacharacters in previous compat levels. However, it did not work properly and as such it was possible to embed arbitrary shell code in earlier compat levels. The dh_installdeb tool will do some basic validation of some of the commands listed in this file to catch common mistakes. The validation is enabled as a warning since compat 10 and as a hard error in compat 12. SEE ALSO
debhelper(7) This program is a part of debhelper. AUTHOR
Joey Hess <joeyh@debian.org> 11.1.6ubuntu2 2018-05-10 DH_INSTALLDEB(1)
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