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Top Forums Shell Programming and Scripting Silly question - how does the "mv" command work? Post 302413659 by verdepollo on Friday 16th of April 2010 02:09:01 PM
Old 04-16-2010
Quote:
Originally Posted by jgt
If both directories are in the same file system only the inode table is updated, the file does not actually move
However the inode does not change when moving a file within the same filesystem:


Code:
$ ls -i file1
    139787 file1
$ mv file1 file2
$ ls -i file2
    139787 file2

Is the same as creating a hard link, and deleting the original reference:

Code:
$ ls -i file1
    139787 file1
$ ln file1 file2
$ rm file1
$ ls -i file2
    139787 file2


Quote:
Usually moving files within the same file system is not the same as copying and then removing the original. First a new link is added to the new directory then the original link is deleted. The data of file is not accessed. This is much it is faster than copy and remove. The file still has the same inode.

Last edited by verdepollo; 04-16-2010 at 03:23 PM.. Reason: Clarify
 

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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. 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. 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. A versioned Pre-Dependency on dpkg is needed to use dpkg-maintscript-helper(1). An appropriate Pre-Dependency is set in ${misc:Pre-Depends} ; you should make sure to put that token into an appropriate place in your debian/control file. SEE ALSO
debhelper(7) This program is a part of debhelper. AUTHOR
Joey Hess <joeyh@debian.org> 8.9.0ubuntu2.1 2012-06-12 DH_INSTALLDEB(1)
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