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Full Discussion: File used
Operating Systems HP-UX File used Post 303016475 by rbatte1 on Friday 27th of April 2018 12:01:16 PM
Old 04-27-2018
When you say used, how do you mean? The file information records three timestamps. Access, change & modification. The command stat and various flags can be used to display any or all of these and the manual page describes what each one is for. It might seem odd, but a change and a modification are not the same.

The flags are as follows:-
Quote:
man stat|grep Time
%x Time of last access
%X Time of last access as seconds since Epoch
%y Time of last modification
%Y Time of last modification as seconds since Epoch
%z Time of last change
%Z Time of last change as seconds since Epoch
I think:-
  • the modification refers to what you normally see as the file's timestamp with something like ls -l $filename
  • the access time is the last read or write operation on the content of the file (but this includes backups
  • the change refers to any operation that updates the inode of the file. This can be a chmod, and update of the content (because the modified time changes)

Does that help?

What format do you need the output as? Sometimes the time since the Epoch (1/1/1970 00:00:00) can be useful to do calculations with.

If you just need to find files older / newer than a known time, perhaps you could use touch with a timestamp to create a reference file and then the -newer /tmp/ref_file or ! -newer /tmp/ref_file construction of a find command.



Do either of these approaches help?
Robin
 

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STAT(1) 							   User Commands							   STAT(1)

NAME
stat - display file or file system status SYNOPSIS
stat [OPTION]... FILE... DESCRIPTION
Display file or file system status. -L, --dereference follow links -f, --file-system display file system status instead of file status -c --format=FORMAT use the specified FORMAT instead of the default; output a newline after each use of FORMAT --printf=FORMAT like --format, but interpret backslash escapes, and do not output a mandatory trailing newline. If you want a newline, include in FORMAT -t, --terse print the information in terse form --help display this help and exit --version output version information and exit The valid format sequences for files (without --file-system): %a Access rights in octal %A Access rights in human readable form %b Number of blocks allocated (see %B) %B The size in bytes of each block reported by %b %C SELinux security context string %d Device number in decimal %D Device number in hex %f Raw mode in hex %F File type %g Group ID of owner %G Group name of owner %h Number of hard links %i Inode number %n File name %N Quoted file name with dereference if symbolic link %o I/O block size %s Total size, in bytes %t Major device type in hex %T Minor device type in hex %u User ID of owner %U User name of owner %x Time of last access %X Time of last access as seconds since Epoch %y Time of last modification %Y Time of last modification as seconds since Epoch %z Time of last change %Z Time of last change as seconds since Epoch Valid format sequences for file systems: %a Free blocks available to non-superuser %b Total data blocks in file system %c Total file nodes in file system %d Free file nodes in file system %f Free blocks in file system %C SELinux security context string %i File System ID in hex %l Maximum length of filenames %n File name %s Block size (for faster transfers) %S Fundamental block size (for block counts) %t Type in hex %T Type in human readable form NOTE: your shell may have its own version of stat, which usually supersedes the version described here. Please refer to your shell's docu- mentation for details about the options it supports. AUTHOR
Written by Michael Meskes. REPORTING BUGS
Report stat bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report stat translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
stat(2) The full documentation for stat is maintained as a Texinfo manual. If the info and stat programs are properly installed at your site, the command info coreutils 'stat invocation' should give you access to the complete manual. GNU coreutils 8.5 February 2011 STAT(1)
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