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Operating Systems Linux Red Hat Touch - changing date and time Post 302930997 by brjohnsmith on Friday 9th of January 2015 09:46:50 AM
Old 01-09-2015
Touch - changing date and time

Hi,

I am facing a problem with the command - TOUCH on Linux.

See the example below:

File on Linux: rw-rw-r-- user1 user1 Jan 01 09:00 test.txt

The file - test.txt was created by the user - user1.

Now, I want to change the date and time, but using other user - user2

The user2 belongs to the same user1 group.

if the command: touch -c -t 201501091030 test.txt - is issued, I have been receiving an error that the operation is not permitted.

However, if I use the command: touch -t 201501091030 xxx.txt , at the same directory, the file xxx.txt is created.

Does anyone know if the touch command is not allowed to change any information from other user, even if it is the same group?

Does anyone know how to solve it?

Tks.
 

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Touch(3pm)						User Contributed Perl Documentation						Touch(3pm)

NAME
File::Touch - update access and modification timestamps, creating nonexistent files where necessary. SYNOPSIS
use File::Touch; @file_list = ('one.txt','../two.doc'); $count = touch(@file_list); use File::Touch; $reference_file = '/etc/passwd'; $touch_obj = File::Touch->new( reference => $reference_file, no_create => 1 ); @file_list = ('one.txt','../two.doc'); $count = $touch_obj->touch(@file_list); DESCRIPTION
Here's a list of arguments that can be used with the object-oriented contruction: atime_only => [0|1] If nonzero, change only the access time of files. Default is zero. mtime_only => [0|1] If nonzero, change only the modification time of files. Default is zero. no_create => [0|1] If nonzero, do not create new files. Default is zero. reference => $reference_file If defined, use timestamps from this file instead of current time. Default is undefined. atime => $time If defined, use this time (in epoch seconds) instead of current time for access time. mtime => $time If defined, use this time (in epoch seconds) instead of current time for modification time. Examples Update access and modification times, creating nonexistent files use File::Touch; my @files = ('one','two','three'); my $count = touch(@files); print "$count files updated "; Set access time forward, leave modification time unchanged use File::Touch; my @files = ('one','two','three'); my $day = 24*60*60; my $time = time() + 30 * $day; my $ref = File::Touch->new( atime_only => 1, time => $time ); my $count = $ref->touch(@files); print "$count files updated "; Set modification time back, update access time, do not create nonexistent files use File::Touch; my @files = ('one','two','three'); my $day = 24*60*60; my $time = time() - 30 * $day; my $ref = File::Touch->new( mtime => $time, no_create => 1 ); my $count = $ref->touch(@files); print "$count files updated "; AUTHOR
Nigel Wetters Gourlay (nwetters@cpan.org) COPYRIGHT
Copyright (c) 2001,2007,2009 Nigel Wetters Gourlay. All Rights Reserved. This module is free software. It may be used, redistributed and/or modified under the same terms as Perl itself. perl v5.10.0 2009-07-25 Touch(3pm)
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